@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/