@misc {MATHEDUC.02406022,
    author       = {Duboux, P.},
    title        = {Let us play with some numbers. Jouons avec quelques nombres. Spielen wir mit einigen Zahlen.},
    howpublished = {Math Ecole. (May 1991) v. 30(148) p. 10-14.},
    year         = {1991},
    msc2010      = {F32xx},
    identifier   = {1991l.02587},
}