References on Magic Squares

1. Dudeney, Henry E. Amusements in Mathematics (1917). Republished - Dover Publications, New York 1970: pp 119 - 126.
2. Gardner, Martin. Martin Gardner's New mathematical Diversions from Scientific American. Simon and Schuster, New York 1966. pp 162-172
3. Andrews, William S. Magic Squares and Cubes. Open Court Publishing 1917. Republished by Constable London - Dover Publications, New York 1960.
4. Andrews, William S. Magic Squares and Cubes. Open Court Publishing 1917. Republished by Constable London - Dover Publications, New York 1960 - p. 237
5. Andrews, William S. Magic Squares and Cubes. Open Court Publishing 1917. Republished by Constable London - Dover Publications, New York 1960 - p. 14