MYDLARCZYK, W. The Existence of Nontrivial Solutions for a Class of Volterra Equations with Smooth Kernels. Mathematica Scandinavica, Berkeley, CA, United States, v. 71, p. 261–266, 1992. DOI: 10.7146/math.scand.a-12427. Disponível em: https://journals.msp.org/mscand/article/view/1220. Acesso em: 24 jul. 2026.