@article{MZ_1971__122_171576,
     author = {Claus Michael Ringel},
     title = {Diagonalisierungspaare. {II.}},
     journal = {Mathematische Zeitschrift},
     pages = {10--32},
     publisher = {mathdoc},
     volume = {122},
     year = {1971},
     zbl = {0206.30101},
     url = {http://geodesic.mathdoc.fr/item/MZ_1971__122_171576/}
}