Arunachalam, Rajarathinam. “Proposing a New Method for the Construction of Optimal Pairwise Balanced Block Designs Based on 3\(^n\) Symmetrical Factorial Design”. Mathematics and Computer Science: Research Updates Vol. 3 (February 21, 2025): 90–99. Accessed June 13, 2026. https://stm.bookpi.org/MCSRU-V3/article/view/17431.