Jing LiXianbo SunWentao HuangLimit cycles near a homoclinic loop connecting a tangent saddle in a perturbed quadratic Hamiltonian system.1071482023June120Commun. Nonlinear Sci. Numer. Simul.https://doi.org/10.1016/j.cnsns.2023.107148db/journals/cnsns/cnsns120.html#LiSH23