%0 Journal Article %A O. A. Platonova %T Singularities in the problem of the quickest by-passing of an obstacle %J Funkcionalʹnyj analiz i ego priloženiâ %D 1981 %P 86-87 %V 15 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_1981_15_2_a16/ %G ru %F FAA_1981_15_2_a16