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CRC Handbook of Combinatorial Designs, 1996, pp. 113ff.
S. Hedayat, N. J. A. Sloane and J. Stufken, Orthogonal Arrays, SpringerVerlag, NY, 1999, Chapter 8.
David Joyner and JonLark Kim, Kittens, Mathematical Blackjack, and Combinatorial Codes, Chapter 3 in SELECTED UNSOLVED PROBLEMS IN CODING THEORY, Applied and Numerical Harmonic Analysis, Springer, 2011, pp. 4770, DOI: 10.1007/9780817682569_3; http://www.springerlink.com/content/w6t033u9607k4834/.
E. T. Parker, Attempts for orthogonal latin 10squares, Abstracts Amer. Math. Soc., Vol. 12 1991 #91T0527.
D. Wells, The Penguin Dictionary of Curious and Interesting Numbers, pp. 58 Penguin Books 1997.
