@article {IOPORT.05516998,
    author       = {Xu, Wen-Qing and Golomb, Solomon W.},
    title        = {Two-dimensional array coloring with many colors.},
    year         = {2008},
    journal      = {IEEE Transactions on Information Theory},
    volume       = {54},
    number       = {9},
    issn         = {0018-9448},
    pages        = {4391-4394},
    publisher    = {Institute of Electrical and Electronics Engineers (IEEE), New York, NY},
    doi          = {10.1109/TIT.2008.928286},
    identifier   = {05516998},
}