Solvability criterion for linear boundary-value problems for integral equations with nondegenerate kernel in Hilbert spaces. Neliniini Kolyvannya, [S. l.], v. 28, n. 1, p. 79–96, 2025. DOI: 10.3842/nosc.v28i1.1498. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/1172. Acesso em: 6 dec. 2025.