Cheng, Kai-Chung, Fu, Hung-Lin, Chiang, Nam-Po, and Tzeng, Chien-Kuo. 2008. “A Study of Total Relative Displacements of Permutations in Paths and Cycles”. Utilitas Mathematica 75 (May). https://utilitasmathematica.com/index.php/Index/article/view/568.