MYDLARCZYK, Wojciech. Remarks on the Existence of Nontrivial Solutions for a Class of Volterra Equations with Smooth Kernels. Mathematica Scandinavica, Berkeley, CA, United States, v. 78, p. 286–292, 1996. DOI: 10.7146/math.scand.a-12590. Disponível em: https://journals.msp.org/mscand/article/view/1043. Acesso em: 25 jul. 2026.