@article {MATHEDUC.02350486,
    author       = {Dienes, Zoltan P.},
    title        = {Mathematical fun without numbers, letters, formulae or equations. Pt. 2.},
    year         = {2002},
    journal      = {The New Zealand Mathematics Magazine},
    volume       = {39},
    number       = {3},
    issn         = {0549-0510},
    pages        = {75-81},
    publisher    = {Auckland Mathematical Association, Auckland},
    abstract     = {The author defines an "addition" on tiles of four different colours and discusses what happens when two stripes consisting of runs of colour are "added" to each other.},
    msc2010      = {A20xx},
    identifier   = {2003b.00820},
}