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@article{AA_1993_5_1_a9, author = {G. Ya. Perel'man}, title = {Elements of {Morse} theory on {Aleksandrov} spaces}, journal = {Algebra i analiz}, pages = {232--241}, publisher = {mathdoc}, volume = {5}, number = {1}, year = {1993}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AA_1993_5_1_a9/} }
G. Ya. Perel'man. Elements of Morse theory on Aleksandrov spaces. Algebra i analiz, Tome 5 (1993) no. 1, pp. 232-241. http://geodesic.mathdoc.fr/item/AA_1993_5_1_a9/