HAYRAPETYAN, H.; MELIKSETYAN, P. On normal solvability of a Dirichlet’s type problem for improperly elliptic equation third order. Armenian Journal of Mathematics, Yerevan, Armenia, v. 2, n. 1, p. 13–27, 2009. Disponível em: http://test.armjmath.sci.am/index.php/ajm/article/view/49. Acesso em: 9 may. 2026.