IL’KIV, V. S.; STRAP , N. I.; VOLYANSKA , I. I. Solvability conditions of a nonlocal boundary value problem for a differential-operator equation with nonlinearity in a refined Sobolev scale of spaces of functions of several real variables. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 72, n. 4, p. 452–466, 2020. DOI: 10.37863/umzh.v72i4.2270. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2270. Acesso em: 17 apr. 2025.