Algebraic Limit Cycles in Piecewise Linear Differential Systems. - Claudio A. Buzzi; Armengol Gasull; Joan Torregrosa (Int. J. Bifurc. Chaos, 2018)

Centers and Limit Cycles of Vector Fields Defined on Invariant Spheres. - Claudio A. Buzzi; Ana Livia Rodero; Joan Torregrosa (J. Nonlinear Sci., 2021)