I. V. Skrypnik
Methods for analysis of nonlinear elliptic boundary value problems
Funkt︠s︡ionalʹnye i chislennye metody matematicheskoĭ fiziki
Metody issledovanii͡a︡ nelineĭnykh ėllipticheskikh granichnykh zadach
Nonlinear elliptic boundary value problems
Obshchai︠a︡ teorii︠a︡ granichnykh zadach
Uravnenii︠a︡ v chastnykh proizvodnykh i zadachi so svobodnoĭ granit︠s︡eĭ