@article{JTNB_2004__16_1_233_0,
     author = {Voloch, Jos\'e Felipe},
     title = {On some subgroups of the multiplicative group of finite rings},
     journal = {Journal de th\'eorie des nombres de Bordeaux},
     pages = {233--239},
     publisher = {Universit\'e Bordeaux 1},
     volume = {16},
     number = {1},
     year = {2004},
     doi = {10.5802/jtnb.445},
     zbl = {1078.11069},
     mrnumber = {2145584},
     language = {en},
     url = {http://www.numdam.org/articles/10.5802/jtnb.445/}
}