@article{GDZPPN002030888,
title = {Symmetrische Permutationsmengen.},
journal = {Aequationes mathematicae},
volume = {18},
year = {1978},
pages = {83-90},
zbl = {0376.20002},
url = {http://dml.mathdoc.fr/item/GDZPPN002030888}
}
Karzel, Helmut. Symmetrische Permutationsmengen.. Aequationes mathematicae, Tome 18 (1978) pp. 83-90. http://gdmltest.u-ga.fr/item/GDZPPN002030888/