@misc{10481/84972, year = {2023}, month = {7}, url = {https://hdl.handle.net/10481/84972}, abstract = {We construct a mathematical model in order to study the so called porpoising effect in racing cars, and prove that, when adding a small periodic perturbation, large-amplitude subharmonic solutions may arise}, publisher = {Elsevier}, keywords = {Discontinuous systems}, keywords = {Periodic boundary value problem}, keywords = {Poincaré–Birkhoff theorem}, title = {Periodic solutions of discontinuous second order differential equations. The porpoising effect}, doi = {10.1016/j.nonrwa.2023.103948}, author = {Fonda, Alessandro and Torres Villarroya, Pedro José}, }