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@article{DAN_1968_179_5_a11, author = {Yu. I. Lyubich}, title = {The convergence of the process of steepest descent}, journal = {Doklady Akademii Nauk}, pages = {1054--1056}, publisher = {mathdoc}, volume = {179}, number = {5}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1968_179_5_a11/} }
Yu. I. Lyubich. The convergence of the process of steepest descent. Doklady Akademii Nauk, Tome 179 (1968) no. 5, pp. 1054-1056. http://geodesic.mathdoc.fr/item/DAN_1968_179_5_a11/