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@article{DAN_1968_181_5_a13, author = {A. S. Tsygankov}, title = {Oscillations of functions biharmonic in the disc}, journal = {Doklady Akademii Nauk}, pages = {1080--1082}, publisher = {mathdoc}, volume = {181}, number = {5}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1968_181_5_a13/} }
A. S. Tsygankov. Oscillations of functions biharmonic in the disc. Doklady Akademii Nauk, Tome 181 (1968) no. 5, pp. 1080-1082. http://geodesic.mathdoc.fr/item/DAN_1968_181_5_a13/