On the question of the uniqueness of the solution of the second boundary value problem for second order elliptic equations

A common method is given for investigating.classical solutions of various boundary value problems for second order elliptic equations: the second boundary value problem in domains with nonsmooth boundaries, the second boundary value problem for degenerating elliptic equations, and problems with oblique derivatives. Existence and uniqueness theorems for classical solutions are proved.
Bibliography: 15 titles.