1. Enumeration and construction of pandiagonal Latin squares of prime order
2. The n-queens problem
3. De quadratis magicis, Leonhardi Euleri commentationes arithmeticae collectae, and (Editors), vol. 2, Academiae imperialis scientiarum Petropolitanae, 1849, pp. 593–602.
4. On magic squares, arXiv math.CO/0408230, 2004, translation from the Latin by Jordan Bell.