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@article{IVM_1988_3_a11, author = {G. V. Davydov and I. M. Davydova}, title = {Non-tree-like coverings in discrete optimization}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {66--69}, publisher = {mathdoc}, number = {3}, year = {1988}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1988_3_a11/} }
G. V. Davydov; I. M. Davydova. Non-tree-like coverings in discrete optimization. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 3 (1988), pp. 66-69. http://geodesic.mathdoc.fr/item/IVM_1988_3_a11/