@article{10_4064_cm90_1_4,
     author = {Maciej Radziejewski},
     title = {A note on certain semigroups of algebraic numbers},
     journal = {Colloquium Mathematicum},
     pages = {51--58},
     publisher = {mathdoc},
     volume = {90},
     number = {1},
     year = {2001},
     doi = {10.4064/cm90-1-4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm90-1-4/}
}