@article{DAN_1973_208_3_a18,
     author = {V. S. Pugachev},
     title = {Normal stochastic systems},
     journal = {Doklady Akademii Nauk},
     pages = {566--569},
     publisher = {mathdoc},
     volume = {208},
     number = {3},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_208_3_a18/}
}