@article{DAN_1973_211_5_a16,
     author = {\`E. M. Saak},
     title = {Geometric stability criterion for the {Dirichlet} problem},
     journal = {Doklady Akademii Nauk},
     pages = {1074--1076},
     publisher = {mathdoc},
     volume = {211},
     number = {5},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_211_5_a16/}
}