@article{02124069,
title = {Circular binary strings without zigzags.},
journal = {Integers},
volume = {3},
year = {2003},
zbl = {1061.05003},
language = {en},
url = {http://dml.mathdoc.fr/item/02124069}
}
Munarini, Emanuele; Salvi, Norma Zagaglia. Circular binary strings without zigzags.. Integers, Tome 3 (2003) . http://gdmltest.u-ga.fr/item/02124069/