Winters, K.C. & Derevensky, J. (February, 2019). Comprehensive Review of Sports Wagering and Gambling Addiction. Washington, DC: National Center on Problem Gambling.
 Humphreys BR, Perez L. Who bets on sports? Characteristics of sports bettors and the consequences of expanding sports betting opportunities. Estudios de economía aplicada. 2012;30(2):579-97.