@article{JTNB_2005__17_3_921_0,
     author = {Solymosi, J\'ozsef},
     title = {On sum-sets and product-sets of complex numbers},
     journal = {Journal de th\'eorie des nombres de Bordeaux},
     pages = {921--924},
     publisher = {Universit\'e Bordeaux 1},
     volume = {17},
     number = {3},
     year = {2005},
     doi = {10.5802/jtnb.527},
     zbl = {05016594},
     mrnumber = {2212132},
     language = {en},
     url = {http://archive.numdam.org/articles/10.5802/jtnb.527/}
}