Voir la notice de l'article provenant de la source Hellenic Digital Mathematics Library
@article{EUG_1990__27_a3, author = {Nick Kassimatis}, title = {Bass and {Serre} theory and {Nielsen} transformations (free and free product case)}, journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Gamma} }, pages = {39-46}, publisher = {mathdoc}, volume = {27}, year = {1990}, language = {gr}, url = {http://geodesic.mathdoc.fr/item/EUG_1990__27_a3/} }
Nick Kassimatis. Bass and Serre theory and Nielsen transformations (free and free product case). Ευκλείδης Γ , Tome 27 (1990), p. 39-46. http://geodesic.mathdoc.fr/item/EUG_1990__27_a3/