Petrosyan AA. VARIATIONAL PROBLEM FOR SOME CLASS OF NONLINEAR PSEUDOPARABOLIC OPERATORS. Proc. YSU A: Phys. Math. Sci. [Internet]. 2023 Sep. 6 [cited 2024 Sep. 20];42(1 (215):24-33. Available from: https://pub.ysu.am/index.php/proceedings-phys-math/article/view/vol42_no1_2008_p024-033