Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{CMH_1944__17_138845, author = {Hans Freudenthal}, title = {\"Uber die {Enden} diskreter {R\"aume} und {Gruppen.}}, journal = {Commentarii mathematici Helvetici}, pages = {1--38}, publisher = {mathdoc}, volume = {17}, year = {1944}, zbl = {0060.40007}, url = {http://geodesic.mathdoc.fr/item/CMH_1944__17_138845/} }
Hans Freudenthal. Über die Enden diskreter Räume und Gruppen.. Commentarii mathematici Helvetici, Tome 17 (1944), pp. 1-38. http://geodesic.mathdoc.fr/item/CMH_1944__17_138845/