%0 Journal Article %A E. A. Astashov %T $\mathcal{A}_k$-singularities of curves and surfaces of fixed degree, quasi-degree, or multi-degree %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 2015 %P 3-9 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMUMM_2015_6_a0/ %G ru %F VMUMM_2015_6_a0