MYDLARCZYK, W. The Existence of Nontrivial Solutions for a Class of Volterra Equations with Smooth Kernels. MATHEMATICA SCANDINAVICA, [S. l.], v. 71, p. 261–266, 1992. DOI: 10.7146/math.scand.a-12427. Disponível em: https://www.mscand.dk/article/view/12427. Acesso em: 6 may. 2024.