@article{JMAG_1997_4_3_a1,
     author = {A. A. Borisenko and D. I. Vlasenko},
     title = {Convex surfaces in {Hyperbolic} space},
     journal = {\v{Z}urnal matemati\v{c}eskoj fiziki, analiza, geometrii},
     pages = {278--285},
     year = {1997},
     volume = {4},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/JMAG_1997_4_3_a1/}
}