@article{DAN_1967_175_5_a13,
     author = {V. S. Pugachev},
     title = {Optimum training systems},
     journal = {Doklady Akademii Nauk},
     pages = {1022--1025},
     publisher = {mathdoc},
     volume = {175},
     number = {5},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1967_175_5_a13/}
}