SPURI, Jéssica, and Lucas Monteiro CHAVES. “AN ELEMENTARY DEMONSTRATION OF THE FRIENDSHIP THEOREM USING GRAPHS WITH AN APPLICATION IN EXPERIMENTAL DESIGNS”. Brazilian Journal of Biometrics 40, no. 3 (September 23, 2022). Accessed October 5, 2024. http://ftpnucleo.ufla.br/index.php/BBJ/article/view/586.