Über den Einfluss der Fußgeometrie auf die Energieeffizienz beim zweibeinigen Gehen. PhD dissertation
Römer, U. J.
2019. KIT Scientific Publishing. doi:10.5445/KSP/1000089994

A rational ansatz for the approximation of Koopman eigenfunctions
Römer, U. J.; Breitenhuber, M.
2024. PAMM. doi:10.1002/pamm.202400187 

Efficiency Study of the Non-instantaneous Double Support Phase in HZD Controlled Bipedal Robot
Luo, Y.; Römer, U. J.; Zirkel, M.; Zentner, L.; Fidlin, A.
2024. Advances in Nonlinear Dynamics, Volume II – Proceedings of the Third International Nonlinear Dynamics Conference (NODYCON 2023). Editor: Walter Lacarbonara, 73–82, Springer Nature Switzerland. doi:10.1007/978-3-031-50639-0_7 

Optimierte Energieeffizienz des zweibeinigen Gehens auf nachgiebigem Untergrund durch elastische Kopplung
Luo, Y.; Römer, U.; Zirkel, M.; Zentner, L.; Fidlin, A.
2024. Zehnte IFToMM D-A-CH Konferenz 2024 : 05./06. März 2024, Universität Rostock, DuEPublico. doi:10.17185/duepublico/81582 

Rotordynamik in Axialfluss-Reluktanzmaschinen unter dem Einfluss externer Schwingungsanregung
Altoé, P.; Römer, U. J.; Fidlin, A.
2023. 4. VDI-Fachtagung: Schwingungen 2023, Würzburg, 27. und 28. November 2023, 155–170, VDI Verlag. doi:10.51202/9783181024294-155

Failing parametrizations: what can go wrong when approximating spectral submanifolds
Stoychev, A. K.; Römer, U. J.
2023. Nonlinear Dynamics, 5963–6000. doi:10.1007/s11071-022-08154-3 

Development of a Database to Simulate and Adapt Compliant Mechanisms to a Given Characteristic for Improving Energy Efficiency of a Walking Robot
Zirkel, M.; Luo, Y.; Römer, U. J.; Fidlin, A.; Zentner, L.
2023. Microactuators, Microsensors and Micromechanisms – MAMM 2022. Ed.: A. Pandey, 46–60, Springer International Publishing. doi:10.1007/978-3-031-20353-4_4

A discrete contact model for complex arbitrary-shaped convex geometries
Marquardt, J. E.; Römer, U. J.; Nirschl, H.; Krause, M. J.
2022. Particuology. doi:10.1016/j.partic.2022.12.005 

Improving Energy Efficiency of a Bipedal Walker with Optimized Nonlinear Elastic Coupling
Luo, Y.; Römer, U. J.; Zentner, L.; Fidlin, A.
2022. Advances in Nonlinear Dynamics – Proceedings of the Second International Nonlinear Dynamics Conference (NODYCON 2021), Volume 2. Ed.: W. Lacarbonara, 253–262, Springer International Publishing. doi:10.1007/978-3-030-81166-2_23 

Improving energy efficiency of bipedal walking using nonlinear compliant mechanisms
Luo, Y.; Zirkel, M.; Römer, U. J.; Zentner, L.; Fidlin, A.
2021. Proceedings in applied mathematics and mechanics, 21 (1), e202100197. doi:10.1002/pamm.202100197 

Anwendung einer Homotopie-Optimierungs-Methode zur Identifikation der Modellparameter eines Roboterprototyps
Luo, Y.; Römer, U. J.; Riegraf, S.; Fidlin, A.; Zirkel, M.; Zentner, L.
2021. 3. VDI-Fachtagung: Schwingungen 2021 ; Würzburg, 16. und 17. November 2021, 259–272, VDI Verlag. doi:10.51202/9783181023914-259 

The Influence of ground inclination on the energy efficiency of a bipedal walking robot
Luo, Y.; Römer, U. J.; Fidlin, A.
2021. Proceedings in applied mathematics and mechanics, 20 (1), e202000142. doi:10.1002/pamm.202000142 

Parameter Study of Compliant Elements for a Bipedal Robot to Increase Its Walking Efficiency
Zirkel, M.; Luo, Y.; Römer, U. J.; Fidlin, A.; Zentner, L.
2021. Microactuators, Microsensors and Micromechanisms : MAMM 2020. Ed.: L. Zentner, 58–75, Springer International Publishing. doi:10.1007/978-3-030-61652-6_6

The normal parameterization and its application to collision detection
Römer, U. J.; Fidlin, A.; Seemann, W.
2020. Mechanism and machine theory, 151, Art.-Nr.: 103906. doi:10.1016/j.mechmachtheory.2020.103906 

A Brief Survey on Non-standard Constraints: Simulation and Optimal Control
Kern, D.; Römer, U. J.
2019. 8th GACM Colloquium on Computational Mechanics For Young Scientists From Academia and Industry, August 28th – 30th, 2019, University of Kassel, Germany Proceedings. Ed.: T. Gleim, 211–214, Kassel University Press 

Explicit analytical solutions for two-dimensional contact detection problems between almost arbitrary geometries and straight or circular counterparts
Römer, U. J.; Fidlin, A.; Seemann, W.
2018. Mechanism and machine theory, 128, 205–224. doi:10.1016/j.mechmachtheory.2018.05.018 

Optimal elastic coupling in form of one mechanical spring to improve energy efficiency of walking bipedal robots
Bauer, F.; Römer, U.; Fidlin, A.; Seemann, W.
2016. Multibody system dynamics, 38 (3), 227–262. doi:10.1007/s11044-016-9509-8 

Simultaneous optimization of gait and design parameters for bipedal robots
Römer, U. J.; Kuhs, C.; Krause, M. J.; Fidlin, A.
2016. Proceedings of the 2016 IEEE International Conference on Robotics and Automation (ICRA), Stockholm, Sweden 16-21 May 2016, 1374–1381, Institute of Electrical and Electronics Engineers (IEEE). doi:10.1109/ICRA.2016.7487271 

Investigation of optimal bipedal walking gaits subject to different energy-based objective functions
Römer, U.; Fidlin, A.; Seemann, W.
2015. Proceedings in applied mathematics and mechanics, 15 (1), 69–70. doi:10.1002/pamm.201510025 

Optimization of energy efficiency of walking bipedal robots by use of elastic couplings in the form of mechanical springs
Bauer, F.; Römer, U.; Fidlin, A.; Seemann, W.
2015. Nonlinear dynamics, 83 (3), 1275–1301. doi:10.1007/s11071-015-2402-9 

Energy-optimized bipedal running of a simple humanoid robot
Römer, U.; Fidlin, A.
2014. Proceedings in applied mathematics and mechanics, 14 (1), 81–82. doi:10.1002/pamm.201410028 

Transition from walking to running of a bipedal robot to optimize energy efficiency
Römer, U.; Bauer, F.; Fidlin, A.
2014. 17th International Conference on Climbing and Walking Robots and the Support Technologies for Mobile Machines, CLAWAR 2014, Poznan, Poland; 21 - 23 July, 2014, 409–416, World Scientific Publishing. doi:10.1142/9789814623353_0048 

A comparison of parametrizations of invariant manifolds for nonlinear model reduction
Stoychev, A. K.; Römer, U. J.
2023, June 20. 3. International Nonlinear Dynamics Conference (NODYCON 2023), Rome, Italy, June 18–22, 2023

Koopman eigenfunction approximations by a least-squares Galerkin method
Römer, U. J.
2023, May 30. 93rd Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM 2023), Dresden, Germany, May 30–June 2, 2023

Collision detection for rigid superellipsoids using the normal parameterization
Römer, U. J.
2021, August 24. 25th International Congress of Theoretical and Applied Mechanics (ICTAM 2021), Online, August 22–27, 2021 

Kontaktdetektion zwischen konvexen Objekten auf Basis der Normalenparameterisierung
Römer, U. J.; Seemann, W.; Fidlin, A.
2020. 6. IFToMM D-A-CH Konferenz 2020 : 27./28. Februar 2020, Campus Technik Lienz. doi:10.17185/duepublico/71212 

Two-dimensional contact problems revisited – explicit analytical solutions for contact detection with straight and circular counterparts
Römer, U. J.; Fidlin, A.; Seemann, W.
2018. 89. Jahrestagung der Gesellschaft für angewandte Mathematik und Mechanik (GAMM 2018), Munich, Germany, March 19–23, 2018

Dance-like motions in optimal walking
Römer, U. J.; Fidlin, A.
2017. 9th European Nonlinear Oscillations Conference (ENOC 2017), Budapest, Hungary, June 25–30, 2017 

Design and optimization of hybrid zero dynamics for a bipedal walking robot with series elastic actuators
Römer, U. J.; Fidlin, A.; Seemann, W.
2016. 87. Jahrestagung der Gesellschaft für angewandte Mathematik und Mechanik (GAMM 2016), Brunswick, Germany, March 7–11, 2016

A novel analytical foot rollover model for planar walking
Römer, U. J.; Fidlin, A.
2016. Dynamic Walking (2016), Holly, MI, USA, June 4–7, 2016 

Energy optimization of bipedal walking through parallel springs
Römer, U.; Bauer, F.; Seemann, W.; Fidlin, A.
2014, May 14. 4th French-German-Japanese Conference on Humanoid and Legged Robots (2014), Heidelberg, Germany, May 12–14, 2014