@article{COMIM_2008_16_1_a3,
     author = {Urban, Roman},
     title = {A survey of results on density modulo $1$ of double sequences containing algebraic numbers},
     journal = {Communications in Mathematics},
     pages = {31--43},
     year = {2008},
     volume = {16},
     number = {1},
     mrnumber = {2498635},
     zbl = {1231.11078},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/COMIM_2008_16_1_a3/}
}