Krivka, Algirdas. “On the Concept of Market Concentration, the Minimum Herfindahl-Hirschman Index, and Its Practical Application”. Panoeconomicus 63, no. 5 (October 10, 2016): 525–540. Accessed May 3, 2024. http://panoeconomicus.org/index.php/jorunal/article/view/2.