@article{FAA_1993_27_1_a8,
     author = {S. M. Gusein-Zade},
     title = {On {Singularities} from which an $A_1$ {Can} be {Split} off},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {68--71},
     publisher = {mathdoc},
     volume = {27},
     number = {1},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1993_27_1_a8/}
}