@article{SLC_2002-2004_49_a7,
     author = {Emanuele Munarini and Norma Zagaglia Salvi},
     title = {Binary {Strings} {Without} {Zigzags}},
     journal = {S\'eminaire lotharingien de combinatoire},
     year = {2002-2004},
     volume = {49},
     url = {http://geodesic.mathdoc.fr/item/SLC_2002-2004_49_a7/}
}