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@article{AA_1989_1_4_a6, author = {P. A. Zalesskii and O. V. Mel'nikov}, title = {Fundamental groups of graphs of profinite groups}, journal = {Algebra i analiz}, pages = {117--135}, publisher = {mathdoc}, volume = {1}, number = {4}, year = {1989}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AA_1989_1_4_a6/} }
P. A. Zalesskii; O. V. Mel'nikov. Fundamental groups of graphs of profinite groups. Algebra i analiz, Tome 1 (1989) no. 4, pp. 117-135. http://geodesic.mathdoc.fr/item/AA_1989_1_4_a6/