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@article{DAN_1970_191_2_a3, author = {Yu. I. Lyubich}, title = {The attraction zone of a saddle point in the process of steepest descent}, journal = {Doklady Akademii Nauk}, pages = {273--274}, publisher = {mathdoc}, volume = {191}, number = {2}, year = {1970}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1970_191_2_a3/} }
Yu. I. Lyubich. The attraction zone of a saddle point in the process of steepest descent. Doklady Akademii Nauk, Tome 191 (1970) no. 2, pp. 273-274. http://geodesic.mathdoc.fr/item/DAN_1970_191_2_a3/