@article{MZM_1974_15_4_a13,
     author = {A. P. Cherenkov},
     title = {Existence theorems for {a~semi-Markov} process with an arbitrary set of states},
     journal = {Matemati\v{c}eskie zametki},
     pages = {621--630},
     year = {1974},
     volume = {15},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1974_15_4_a13/}
}