Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{BAG_1975__4_138113, author = {L.C.A. van LEE\"UWEN}, title = {On endomorphisms and quasi-endomorphisms of torsionfree groups}, journal = {Beitr\"age zur Algebra und Geometrie}, pages = {15--22}, publisher = {mathdoc}, volume = {4}, year = {1975}, zbl = {0336.20039}, url = {http://geodesic.mathdoc.fr/item/BAG_1975__4_138113/} }
L.C.A. van LEEÜWEN. On endomorphisms and quasi-endomorphisms of torsionfree groups. Beiträge zur Algebra und Geometrie, Tome 4 (1975), pp. 15-22. http://geodesic.mathdoc.fr/item/BAG_1975__4_138113/