HORODETS’KYI, V. V.; MARTYNYUK, O. V. Nonlocal Problem Multipoint in Time for the Evolutionary Equations with Pseudo-Bessel Operators with Variable Symbols. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 66, n. 2, p. 159–175, 2014. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2120. Acesso em: 5 dec. 2025.