@article{GDZPPN002411318,
title = {Ends and Amalgamated Free Products of Groups.},
journal = {Mathematische Zeitschrift},
volume = {129},
year = {1972},
pages = {265-272},
zbl = {0227.20010},
url = {http://dml.mathdoc.fr/item/GDZPPN002411318}
}
Oxley, Peter C. Ends and Amalgamated Free Products of Groups.. Mathematische Zeitschrift, Tome 129 (1972) pp. 265-272. http://gdmltest.u-ga.fr/item/GDZPPN002411318/