Leo, Egghe, Rousseau Ronald, Leo Egghe, and Ronald Rousseau. 2017. “A Basic Indicator for Relative Contributions and a Remarkable Difference Between a Ratio of Averages and an Average of Ratios”. Malaysian Journal of Library and Information Science 19 (1). https://jice.um.edu.my/index.php/MJLIS/article/view/1802.