TY - GEN AU - Fonda, Alessandro AU - Torres Villarroya, Pedro José PY - 2023 UR - https://hdl.handle.net/10481/84972 AB - 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 LA - eng PB - Elsevier KW - Discontinuous systems KW - Periodic boundary value problem KW - Poincaré–Birkhoff theorem TI - Periodic solutions of discontinuous second order differential equations. The porpoising effect DO - 10.1016/j.nonrwa.2023.103948 ER -