@article{10_1017_S0017089511000462,
     author = {ZAIMI, TOUFIK},
     title = {ON {THE} {SPECTRA} {OF} {PISOT} {NUMBERS}},
     journal = {Glasgow mathematical journal},
     pages = {127--132},
     year = {2012},
     volume = {54},
     number = {1},
     doi = {10.1017/S0017089511000462},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089511000462/}
}