@article{DM_1992_4_3_a4,
     author = {V. N. Sachkov},
     title = {Random minimal coverings of sets},
     journal = {Diskretnaya Matematika},
     pages = {64--74},
     year = {1992},
     volume = {4},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1992_4_3_a4/}
}