KOVAL’CHUK, Yu. A.; KOZACHENKO, Yu. V. Boundary-Value problems with random initial conditions and functional series from subφ (Ω). I. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 50, n. 4, p. 504–515, 1998. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4920. Acesso em: 17 apr. 2025.