Otulo, C.W, Z.M Muga, N.B Okelo, and J.O Nyakinda. “Relative Efficiency of Sum Constructed Automorphic Symmetric Balanced Incomplete Block Designs”. International Journal of Modern Computation, Information and Communication Technology 3, no. 2 (December 24, 2020): 56–63. Accessed February 5, 2026. https://gjpublications.com/index.php/IJMCICT/article/view/56.