@article{JTNB_1996__8_1_243_0,
     author = {Cozar, Lionel},
     title = {Le semi-groupe libre des carr\'es magiques},
     journal = {Journal de th\'eorie des nombres de Bordeaux},
     pages = {243--249},
     publisher = {Universit\'e Bordeaux I},
     volume = {8},
     number = {1},
     year = {1996},
     mrnumber = {1399957},
     zbl = {0957.05020},
     language = {fr},
     url = {http://www.numdam.org/item/JTNB_1996__8_1_243_0/}
}