Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{ELMA_1969__24_140930, author = {K. Fladt}, title = {Zur {M\"obiusinvolution} der {Ebene.}}, journal = {Elemente der Mathematik}, pages = {62--63}, publisher = {mathdoc}, volume = {24}, year = {1969}, zbl = {0175.18205}, url = {http://geodesic.mathdoc.fr/item/ELMA_1969__24_140930/} }
K. Fladt. Zur Möbiusinvolution der Ebene.. Elemente der Mathematik, Tome 24 (1969), pp. 62-63. http://geodesic.mathdoc.fr/item/ELMA_1969__24_140930/