@article{JTNB_2000__12_1_69_0,
     author = {Akiyama, Shigeki and Thuswaldner, J\"org M.},
     title = {Topological properties of two-dimensional number systems},
     journal = {Journal de th\'eorie des nombres de Bordeaux},
     pages = {69--79},
     publisher = {Universit\'e Bordeaux I},
     volume = {12},
     number = {1},
     year = {2000},
     mrnumber = {1827838},
     zbl = {1012.11072},
     language = {en},
     url = {http://www.numdam.org/item/JTNB_2000__12_1_69_0/}
}