%0 Journal Article %A S. M. Gusein-Zade %A N. N. Nekhoroshev %T Contiguity of $A_k$-singularities at points of the stratum $\mu=\operatorname{const}$ of a singularity %J Funkcionalʹnyj analiz i ego priloženiâ %D 1983 %P 82-83 %V 17 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_1983_17_4_a11/ %G ru %F FAA_1983_17_4_a11