TY - JOUR AU - I. A. Bikchantaev TI - Doubly periodic problem on a jump~for linear elliptic second order equation with constant coefficients JO - Izvestiâ vysših učebnyh zavedenij. Matematika PY - 2019 SP - 13 EP - 20 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IVM_2019_2_a1/ LA - ru ID - IVM_2019_2_a1 ER -