@article{GDZPPN002471833,
title = {Number of Recurring Cycles.},
journal = {Monatshefte f\"ur Mathematik},
volume = {60},
year = {1956},
pages = {183-189},
zbl = {0071.26906},
url = {http://dml.mathdoc.fr/item/GDZPPN002471833}
}
Parameswaran, S. Number of Recurring Cycles.. Monatshefte für Mathematik, Tome 60 (1956) pp. 183-189. http://gdmltest.u-ga.fr/item/GDZPPN002471833/