Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{ELMA_1985__40_141354, author = {Albert Pfluger}, title = {Varianten des {Schwarzschen} {Lemma.}}, journal = {Elemente der Mathematik}, pages = {46--47}, publisher = {mathdoc}, volume = {40}, year = {1985}, zbl = {0566.30021}, url = {http://geodesic.mathdoc.fr/item/ELMA_1985__40_141354/} }
Albert Pfluger. Varianten des Schwarzschen Lemma.. Elemente der Mathematik, Tome 40 (1985), pp. 46-47. http://geodesic.mathdoc.fr/item/ELMA_1985__40_141354/