@article{1255631587,
author = {Gilbert, E. N. and Riordan, John},
title = {Symmetry types of periodic sequences},
journal = {Illinois J. Math.},
volume = {5},
number = {1},
year = {1961},
pages = { 657-665},
language = {en},
url = {http://dml.mathdoc.fr/item/1255631587}
}
Gilbert, E. N.; Riordan, John. Symmetry types of periodic sequences. Illinois J. Math., Tome 5 (1961) no. 1, pp. 657-665. http://gdmltest.u-ga.fr/item/1255631587/