PETROSYAN, A. A. VARIATIONAL PROBLEM FOR SOME CLASS OF NONLINEAR PSEUDOPARABOLIC OPERATORS. Proceedings of the YSU A: Physical and Mathematical Sciences, Yerevan, Armenia, v. 42, n. 1 (215), p. 24–33, 2023. DOI: 10.46991/PYSU:A/2008.42.1.024. Disponível em: https://journals.ysu.am/index.php/proceedings-phys-math/article/view/vol42_no1_2008_p024-033. Acesso em: 22 jul. 2024.