@article{DAN_1997_354_6_a5,
     author = {A. V. Pogorelov},
     title = {On the stability of minimal surfaces in {Lobachevski\u{i}} space},
     journal = {Doklady Akademii Nauk},
     pages = {742--744},
     year = {1997},
     volume = {354},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1997_354_6_a5/}
}