PTASHNIK, B. I.; TYMKIV, I. R. Multipoint Problem for B-Parabolic Equations. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 65, n. 3, p. 418–429, 2013. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2428. Acesso em: 5 dec. 2025.