Watkins, J. J. (2004). Across the board: The mathematics of chessboard problems. Princeton University Press.
Citace podle Chicago (17th ed.)Watkins, John J. Across the Board: The Mathematics of Chessboard Problems. Princeton: Princeton University Press, 2004.
Citace podle MLA (9th ed.)Watkins, John J. Across the Board: The Mathematics of Chessboard Problems. Princeton University Press, 2004.
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