Chinchilla-Mira, J. J., Pérez-Turpin, J. A., Martínez-Carbonell, J. A., & Jove-Tossi, M. A. (2012). Offensive zones in beach volleyball: Differences by gender. Journal of Human Sport and Exercise, 7(3), 727–732. https://doi.org/10.4100/jhse.2012.73.12