@article{10_4064_aa111_1_2,
     author = {Shigeki Akiyama and Hui Rao},
     title = {New criteria for canonical number systems},
     journal = {Acta Arithmetica},
     pages = {5--25},
     publisher = {mathdoc},
     volume = {111},
     number = {1},
     year = {2004},
     doi = {10.4064/aa111-1-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa111-1-2/}
}