@article{GDZPPN002432854, title = {Geometry of Free Products.}, journal = {Mathematische Zeitschrift}, volume = {192}, year = {1986}, pages = {613-624}, zbl = {0584.20016}, url = {http://dml.mathdoc.fr/item/GDZPPN002432854} }
Kulkarni, Ravi S. Geometry of Free Products.. Mathematische Zeitschrift, Tome 192 (1986) pp. 613-624. http://gdmltest.u-ga.fr/item/GDZPPN002432854/