Nemtsev, Oleg, Natalia Nemtseva, Aydamir Bguashev, Salman Elipkhanov, and Irina Grekalova. 2017. “Gender Differences in Takeoff Techniques of Non-Elite Russian Long Jumpers”. Journal of Human Sport and Exercise 11 (4):444-54. https://doi.org/10.14198/jhse.2016.114.05.