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@article{IVM_1984_1_a4, author = {S. I. Chelkak}, title = {Regularity of solutions of quasilinear elliptic systems of higher order}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {33--41}, publisher = {mathdoc}, number = {1}, year = {1984}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1984_1_a4/} }
S. I. Chelkak. Regularity of solutions of quasilinear elliptic systems of higher order. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 1 (1984), pp. 33-41. http://geodesic.mathdoc.fr/item/IVM_1984_1_a4/