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@article{MZ_1971__119_171482, author = {Robert G. Burns}, title = {On the {Intersection} of {Finitely} {Generated} {Subgroups} of a {Free} {Group.}}, journal = {Mathematische Zeitschrift}, pages = {121--130}, publisher = {mathdoc}, volume = {119}, year = {1971}, zbl = {0197.29801}, url = {http://geodesic.mathdoc.fr/item/MZ_1971__119_171482/} }
Robert G. Burns. On the Intersection of Finitely Generated Subgroups of a Free Group.. Mathematische Zeitschrift, Tome 119 (1971), pp. 121-130. http://geodesic.mathdoc.fr/item/MZ_1971__119_171482/