@article{10_14712_1213_7243_2015_247,
     author = {Holub, \v{S}t\v{e}p\'an and S\'ykora, Ji\v{r}{\'\i}},
     title = {Binary equality words with two $b$'s},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {153--172},
     publisher = {mathdoc},
     volume = {59},
     number = {2},
     year = {2018},
     doi = {10.14712/1213-7243.2015.247},
     mrnumber = {3815682},
     zbl = {06940860},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.14712/1213-7243.2015.247/}
}