@article{GDZPPN002429373, title = {The p-adic Topology on a Free Group: A Counterexample.}, journal = {Mathematische Zeitschrift}, volume = {185}, year = {1984}, pages = {25-28}, zbl = {0548.20017}, url = {http://dml.mathdoc.fr/item/GDZPPN002429373} }
Howie, James. The p-adic Topology on a Free Group: A Counterexample.. Mathematische Zeitschrift, Tome 185 (1984) pp. 25-28. http://gdmltest.u-ga.fr/item/GDZPPN002429373/