@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/