%0 Journal Article %A A. A. Uspenskii %A P. D. Lebedev %T On the structure of the singular set of solutions in one class of 3D time-optimal control problems %J Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹûternye nauki %D 2021 %P 471-486 %V 31 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/VUU_2021_31_3_a8/ %G ru %F VUU_2021_31_3_a8