@article{GDZPPN002216418,
title = {Zur Theorie endlicher geschlitzter Inzidenzgruppen.},
journal = {Manuscripta mathematica},
volume = {4},
year = {1971},
pages = {359-372},
zbl = {0222.50026},
url = {http://dml.mathdoc.fr/item/GDZPPN002216418}
}
Pieper, Irene. Zur Theorie endlicher geschlitzter Inzidenzgruppen.. Manuscripta mathematica, Tome 4 (1971) pp. 359-372. http://gdmltest.u-ga.fr/item/GDZPPN002216418/