Solvability of a class of mixed type second order equations and nonlocal estimates. - Mussakan Muratbekov; Kordan Ospanov; Sabit Igissinov (Appl. Math. Lett., 2012)

Estimates of Eigenvalues of a Semiperiodic Dirichlet Problem for a Class of Degenerate Elliptic Equations. - Mussakan Muratbekov; Sabit Igissinov (Symmetry, 2022)

Estimates of Eigenvalues and Approximation Numbers for a Class of Degenerate Third-Order Partial Differential Operators. - Mussakan Muratbekov; Ainash Suleimbekova; Mukhtar Baizhumanov (Axioms, 2024)