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@article{FAA_1986_20_3_a2, author = {A. B. Givental'}, title = {Lagrangian imbeddings of surfaces and unfolded {Whitney} umbrella}, journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a}, pages = {35--41}, publisher = {mathdoc}, volume = {20}, number = {3}, year = {1986}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/FAA_1986_20_3_a2/} }
A. B. Givental'. Lagrangian imbeddings of surfaces and unfolded Whitney umbrella. Funkcionalʹnyj analiz i ego priloženiâ, Tome 20 (1986) no. 3, pp. 35-41. http://geodesic.mathdoc.fr/item/FAA_1986_20_3_a2/