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@article{DAN_1989_304_5_a4, author = {M. I. Zelikin and V. F. Borisov}, title = {Fields of optimal trajectories that contain second-order singular}, journal = {Doklady Akademii Nauk}, pages = {1050--1053}, publisher = {mathdoc}, volume = {304}, number = {5}, year = {1989}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1989_304_5_a4/} }
M. I. Zelikin; V. F. Borisov. Fields of optimal trajectories that contain second-order singular. Doklady Akademii Nauk, Tome 304 (1989) no. 5, pp. 1050-1053. http://geodesic.mathdoc.fr/item/DAN_1989_304_5_a4/