@article{JIS_2004__7_1_a2,
     author = {Panayotopoulos,  A. and Tsikouras,  P.},
     title = {Meanders and {Motzkin} words},
     journal = {Journal of integer sequences},
     year = {2004},
     volume = {7},
     number = {1},
     zbl = {1101.68743},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2004__7_1_a2/}
}