@article{SM_1971_15_4_a7,
     author = {A. K. Zvonkin},
     title = {On sequentially controlled {Markov} processes},
     journal = {Sbornik. Mathematics},
     pages = {607--617},
     publisher = {mathdoc},
     volume = {15},
     number = {4},
     year = {1971},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1971_15_4_a7/}
}