1. Unsolved problems on magic squares;Abe;Discrete Math.,1994
2. Mutually orthogonal Latin squares;Abel,2006
3. M. Ahmed, Algebric combinatorics of magic squares, Ph.D. Dissertation, University of California, Davis, 2004.
4. Magic Squares and Cubes;Andrews,1960
5. C. Boyer, Multimagic squares [DB/OL]. http://www.multimagie.com.