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@article{10_21136_CMJ_1960_100392, author = {Cristescu, Romulus}, title = {Sur les groupes dirig\'es}, journal = {Czechoslovak Mathematical Journal}, pages = {17--26}, publisher = {mathdoc}, volume = {10}, number = {1}, year = {1960}, doi = {10.21136/CMJ.1960.100392}, mrnumber = {0113952}, zbl = {0098.25102}, language = {fr}, url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1960.100392/} }
Cristescu, Romulus. Sur les groupes dirigés. Czechoslovak Mathematical Journal, Tome 10 (1960) no. 1, pp. 17-26. doi : 10.21136/CMJ.1960.100392. http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1960.100392/
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