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@article{DA_1975_14_a5, author = {A. I. Serdyukov}, title = {The covering problem}, journal = {Diskretnyj analiz i issledovanie operacij}, pages = {52--58}, publisher = {mathdoc}, number = {14}, year = {1975}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DA_1975_14_a5/} }
A. I. Serdyukov. The covering problem. Diskretnyj analiz i issledovanie operacij, no. 14 (1975), pp. 52-58. http://geodesic.mathdoc.fr/item/DA_1975_14_a5/