Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MZ_1970__117_171425, author = {Claus Michael Ringel}, title = {Diagonalisierungspaare. {I.}}, journal = {Mathematische Zeitschrift}, pages = {249--266}, publisher = {mathdoc}, volume = {117}, year = {1970}, zbl = {0206.30002}, url = {http://geodesic.mathdoc.fr/item/MZ_1970__117_171425/} }
Claus Michael Ringel. Diagonalisierungspaare. I.. Mathematische Zeitschrift, Tome 117 (1970), pp. 249-266. http://geodesic.mathdoc.fr/item/MZ_1970__117_171425/