Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MZ_1962__78_170040, author = {Gilbert Baumslag}, title = {On generalised free products.}, journal = {Mathematische Zeitschrift}, pages = {423--438}, publisher = {mathdoc}, volume = {78}, year = {1962}, zbl = {0104.24402}, url = {http://geodesic.mathdoc.fr/item/MZ_1962__78_170040/} }
Gilbert Baumslag. On generalised free products.. Mathematische Zeitschrift, Tome 78 (1962), pp. 423-438. http://geodesic.mathdoc.fr/item/MZ_1962__78_170040/