Gomez-Gonzalez, Carlos, and Julio del Corral. “The Betting Market over Time: Overround and Surebets in European Football”. Economics and Business Letters 7, no. 4 (November 23, 2018): 129–136. Accessed September 17, 2026. http://156.35.33.188/index.php/EBL/article/view/12711.