@article{DAN_1960_133_5_a15,
     author = {G. A. Gurzadyan},
     title = {New two-shell planetary nebulae},
     journal = {Doklady Akademii Nauk},
     pages = {1053--1055},
     year = {1960},
     volume = {133},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1960_133_5_a15/}
}