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@article{DAN_1991_320_5_a2, author = {A. Dzhuraev}, title = {On a degenerate boundary value problem in $3$-dimensional space}, journal = {Doklady Akademii Nauk}, pages = {1043--1048}, publisher = {mathdoc}, volume = {320}, number = {5}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1991_320_5_a2/} }
A. Dzhuraev. On a degenerate boundary value problem in $3$-dimensional space. Doklady Akademii Nauk, Tome 320 (1991) no. 5, pp. 1043-1048. http://geodesic.mathdoc.fr/item/DAN_1991_320_5_a2/