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@article{DAN_1975_221_5_a9, author = {Yu. F. Pronozin}, title = {On time-optimal problems}, journal = {Doklady Akademii Nauk}, pages = {1042--1045}, publisher = {mathdoc}, volume = {221}, number = {5}, year = {1975}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1975_221_5_a9/} }
Yu. F. Pronozin. On time-optimal problems. Doklady Akademii Nauk, Tome 221 (1975) no. 5, pp. 1042-1045. http://geodesic.mathdoc.fr/item/DAN_1975_221_5_a9/