@article{EP_2012_36_a5,
     author = {Sandra Vaz and Pedro Martins Rodrigues},
     title = {Periodicity of \ensuremath{\beta}-expansions for certain {Pisot} units},
     journal = {ESAIM. Proceedings},
     pages = {48--60},
     year = {2012},
     volume = {36},
     doi = {10.1051/proc/201236005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1051/proc/201236005/}
}