A cyclic or bicyclic \(9 \times 37\) double Youden rectangle (DYR) is provided for each of the four biplanes with \(k = 9\). These DYRs were obtained by computer search.
Citation
N. C. K. Phillips , D. A. Preece, D. H. Rees. Double Youden Rectangles for the Four Biplanes with \(k = 9\)[J], Journal of Combinatorial Mathematics and Combinatorial Computing, Volume 044. 169-176. DOI: .