@article{10_4153_CMB_1985_041_6,
     author = {Boyd, David},
     title = {Which {Rationals} are {Ratios} of {Pisot} {Sequences?}},
     journal = {Canadian mathematical bulletin},
     pages = {343--349},
     year = {1985},
     volume = {28},
     number = {3},
     doi = {10.4153/CMB-1985-041-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1985-041-6/}
}