%0 Journal Article %A V. D. Sedykh %T On the adjacency of type $D$ singularities of a front %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 2024 %P 550-552 %V 79 %N 3 %U http://geodesic.mathdoc.fr/item/RM_2024_79_3_a4/ %G en %F RM_2024_79_3_a4