TY - JOUR AU - S. I. Chelkak TI - Exact conditions for the regularity of generalized solutions of fourth-order quasilinear elliptic systems JO - Izvestiâ vysših učebnyh zavedenij. Matematika PY - 1986 SP - 55 EP - 61 IS - 12 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IVM_1986_12_a11/ LA - ru ID - IVM_1986_12_a11 ER -