Voir la notice de l'article provenant de la source Math-Net.Ru
@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/} }
S. M. Gusein-Zade. On Singularities from which an $A_1$ Can be Split off. Funkcionalʹnyj analiz i ego priloženiâ, Tome 27 (1993) no. 1, pp. 68-71. http://geodesic.mathdoc.fr/item/FAA_1993_27_1_a8/