@article{DE_1972_8_10_a4,
     author = {E. S. Lehnitsky},
     title = {The construction of the equations of a programmed motion having extremal properties},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1761--1766},
     publisher = {mathdoc},
     volume = {8},
     number = {10},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1972_8_10_a4/}
}