Denardi, R. A., Romero, F., Oliveira, T. A. C., Silva, S. L., Travassos, B., & Corrêa, U. C. (2017). The influence of defender’s positional gap on the aces in the sport of volleyball. Journal of Human Sport and Exercise, 12(2), 286–293. https://doi.org/10.14198/jhse.2017.122.05