@article{MZ_1983__184_173367,
     author = {Helmut M\"aurer},
     title = {Die harmonischen {Involutionen} der {Permutationsgruppe} {P...L2} {(K).}},
     journal = {Mathematische Zeitschrift},
     pages = {333--338},
     publisher = {mathdoc},
     volume = {184},
     year = {1983},
     url = {http://geodesic.mathdoc.fr/item/MZ_1983__184_173367/}
}