@article{ZNSL_2012_402_a9,
     author = {M. Huova and J. Karhum\"aki},
     title = {On $k$-abelian avoidability},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {170--182},
     year = {2012},
     volume = {402},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2012_402_a9/}
}