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@article{TRSPY_1985_172_a16, author = {P. I. Lizorkin}, title = {On the theory of degenerate elliptic equations}, journal = {Informatics and Automation}, pages = {235--251}, publisher = {mathdoc}, volume = {172}, year = {1985}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TRSPY_1985_172_a16/} }
P. I. Lizorkin. On the theory of degenerate elliptic equations. Informatics and Automation, Investigations on the theory of functions of several real variables and approximation of functons, Tome 172 (1985), pp. 235-251. http://geodesic.mathdoc.fr/item/TRSPY_1985_172_a16/