@article{VSPUI_2019_15_3_a0,
     author = {V. V. Abramova and S. I. Dudov and A. V. Zharkova},
     title = {The formula for the subdifferential of the distance function to a convex set in an nonsymmetrical space},
     journal = {Vestnik Sankt-Peterburgskogo universiteta. Prikladna\^a matematika, informatika, processy upravleni\^a},
     pages = {300--309},
     publisher = {mathdoc},
     volume = {15},
     number = {3},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSPUI_2019_15_3_a0/}
}