TY - JOUR AU - A. K. Ratyni TI - To the theory of boundary problems for elliptic equations with superposition operators in the boundary condition JO - Izvestiâ vysših učebnyh zavedenij. Matematika PY - 2013 SP - 51 EP - 61 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IVM_2013_1_a4/ LA - ru ID - IVM_2013_1_a4 ER -