@article{GDZPPN002028948, title = {An identity for fixed points of permutations.}, journal = {Aequationes mathematicae}, volume = {13}, year = {1975}, pages = {155-156}, zbl = {0351.05007}, url = {http://dml.mathdoc.fr/item/GDZPPN002028948} }
Goldman, Jay R. An identity for fixed points of permutations.. Aequationes mathematicae, Tome 13 (1975) pp. 155-156. http://gdmltest.u-ga.fr/item/GDZPPN002028948/