@article{DAN_1987_297_5_a4,
     author = {V. I. Kruglikov},
     title = {Prime ends of three-dimensional domains with variable boundaries},
     journal = {Doklady Akademii Nauk},
     pages = {1047--1050},
     year = {1987},
     volume = {297},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_297_5_a4/}
}