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@article{IM2_1970_4_5_a6, author = {Ya. M. Eliashberg}, title = {On singularities of folding type}, journal = {Izvestiya. Mathematics }, pages = {1119--1134}, publisher = {mathdoc}, volume = {4}, number = {5}, year = {1970}, language = {en}, url = {http://geodesic.mathdoc.fr/item/IM2_1970_4_5_a6/} }
Ya. M. Eliashberg. On singularities of folding type. Izvestiya. Mathematics , Tome 4 (1970) no. 5, pp. 1119-1134. http://geodesic.mathdoc.fr/item/IM2_1970_4_5_a6/