1. C. J.Colbourn and J. H.Dinitz (Editors), Handbook of Combinatorial Designs, Second Edition, Chapman & Hall, Boca Raton/London/New York, 2007.
2. D. Ž. Đoković, Skew-Hadamard matrices of orders 188 and 388 exist, arXiv:0704.0640v1 [math.CO] 4 April 2007.
3. Good matrices of orders 33, 35 and 127 exist;Đoković;J Comb Math Comb Comput,1993