@article{10_4064_aa99_2_4,
     author = {I. K\'atai and P. Liardet},
     title = {Additive functions with respect to expansions
over the set of {Gaussian} integers},
     journal = {Acta Arithmetica},
     pages = {173--182},
     publisher = {mathdoc},
     volume = {99},
     number = {2},
     year = {2001},
     doi = {10.4064/aa99-2-4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa99-2-4/}
}