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@article{IVM_1978_2_a15, author = {N. P. Titov}, title = {A~graph-scheme of the coherence problem}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {105--108}, publisher = {mathdoc}, number = {2}, year = {1978}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1978_2_a15/} }
N. P. Titov. A~graph-scheme of the coherence problem. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 2 (1978), pp. 105-108. http://geodesic.mathdoc.fr/item/IVM_1978_2_a15/