@article{TM_1993_202_a3,
     author = {A. A. Butov},
     title = {Some random environments statistical problems for observable birth-and-death processes},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {25--32},
     year = {1993},
     volume = {202},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1993_202_a3/}
}