1. On the number of mutually orthogonal partial Latin squares;Abdel-Ghaffar;Ars Combin.,1996
2. D. Archdeacon, J. Dinitz, F. Harary, Orthogonal edge colorings of graphs, in: Proceedings of the Sixteenth Southeastern International Conference on Combinatorics, Graph Theory and Computing (Boca Raton, Fla., 1985), Vol. 47, 1985, pp. 49–67.
3. Sudoku, gerechte designs, resolutions, affine space, spreads, reguli, and Hamming codes;Bailey;Amer. Math. Monthly,2008
4. Orthogonal colorings of graphs;Caro;Electron. J. Combin.,1999
5. Latin Squares and their Applications;Dénes,1974