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@article{IVM_1968_9_a11, author = {A. Ya. Chilap}, title = {A~conjugacy problem for equations of elliptic type}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {106--111}, publisher = {mathdoc}, number = {9}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1968_9_a11/} }
A. Ya. Chilap. A~conjugacy problem for equations of elliptic type. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 9 (1968), pp. 106-111. http://geodesic.mathdoc.fr/item/IVM_1968_9_a11/