APAKOV, Yusufjon P. P.; RUTKAUSKAS, Stasys. On a boundary value problem to third order PDE with multiple characteristics. Nonlinear Analysis: Modelling and Control, [S. l.], v. 16, n. 3, p. 255–269, 2011. DOI: 10.15388/NA.16.3.14092. Disponível em: https://www.journals.vu.lt/nonlinear-analysis/article/view/14092.. Acesso em: 6 may. 2024.