@article{TVP_1969_14_4_a15,
     author = {A. G. Fakeyev},
     title = {On necessary conditions of optimality for sequential decision problems},
     journal = {Teori\^a vero\^atnostej i ee primeneni\^a},
     pages = {742--746},
     publisher = {mathdoc},
     volume = {14},
     number = {4},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TVP_1969_14_4_a15/}
}