@article{10_4064_fm_82_3_239_244,
     author = {J. Bil\'y and L. Bukovsk\'y},
     title = {On expansions of \ensuremath{\beta}-models},
     journal = {Fundamenta Mathematicae},
     pages = {239--244},
     publisher = {mathdoc},
     volume = {82},
     number = {3},
     year = {1974},
     doi = {10.4064/fm-82-3-239-244},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-82-3-239-244/}
}