@article{GDZPPN002408198,
title = {On the Intersection of Finitely Generated Subgroups of a Free Group.},
journal = {Mathematische Zeitschrift},
volume = {121},
year = {1971},
pages = {121-130},
zbl = {0197.29801},
url = {http://dml.mathdoc.fr/item/GDZPPN002408198}
}
Burns, Robert G. On the Intersection of Finitely Generated Subgroups of a Free Group.. Mathematische Zeitschrift, Tome 121 (1971) pp. 121-130. http://gdmltest.u-ga.fr/item/GDZPPN002408198/