1. and , Orthogonal designs, and (Editors), in CRC Handbook of Combinatorial Designs, CRC Press, Boca Raton, FL, 1996, pp. 400–406.
2. and , Orthogonal Designs: Quadratic Forms and Hadamard Matrices, Marcel Dekker, New York-Basel, 1979.
3. On the orthogonal designs of order 24
4. On the orthogonal designs of order 40