@article{MMO_1960_9_a5,
     author = {V. A. Volkonskii},
     title = {Additive functionals of {Markov} processes},
     journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva},
     pages = {143--189},
     publisher = {mathdoc},
     volume = {9},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MMO_1960_9_a5/}
}