Momozaki, T., T. Nakagawa, K. Iki, and S. Tomizawa. “An Index for the Degree and Directionality of Asymmetry for Square Contingency Tables With Ordered Categories”. Austrian Journal of Statistics, vol. 52, no. 1, Mar. 2023, pp. 62-71, doi:10.17713/ajs.v52i1.1382.