Anouk Nicolopoulos, Martin Campos Pinto, Bruno Després, Patrick Ciarlet, “Degenerate elliptic equations for resonant wave problems”, IMA Journal of Applied Mathematics, 85, no. 1, 2020, 132
Leila Nasiri, Ali Sameripour, “Resolvent of Non-selfadjoint Differential Operators Using M-Sectorial Operators”, Bull. Iran. Math. Soc., 47, no. 4, 2021, 1235
Sulaimon Abunasrovich Iskhokov, Bakhtovar Abduganievich Rakhmonov, “Solvability and smoothness of solution to variational Dirichlet problem in entire space associated with a non-coercive form”, Ufimsk. Mat. Zh., 12, no. 1, 2020, 13