@article{NSJOM_1999_29_1a_3,
     author = {R. 

 Doroslova\v{c}ki},
     title = {on binary n-words with {Forbidden} 

 4-subwords},
     journal = {Novi Sad Journal of Mathematics},
     pages = {27-32},
     publisher = {mathdoc},
     volume = {29},
     number = {1},
     year = {1999},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1999_29_1a_3/}
}