@article{GDZPPN002067579,
title = {Amalgamated products and finitely presented groups.},
journal = {Commentarii mathematici Helvetici},
volume = {65},
year = {1990},
pages = {243-254},
zbl = {0711.20015},
url = {http://dml.mathdoc.fr/item/GDZPPN002067579}
}
Baumslag, Gilbert; Shalen, Peter B. Amalgamated products and finitely presented groups.. Commentarii mathematici Helvetici, Tome 65 (1990) pp. 243-254. http://gdmltest.u-ga.fr/item/GDZPPN002067579/