K. Ferger, F. Helm, and K. Zentgraf, “ESTIMATING HORIZONTAL DISPLACEMENT DEDUCTION IN TRAMPOLINE GYMNASTICS BY MEANS OF CONSTANT AND VARIABLE ERRORS OF LANDING POSITIONS: A NEW GOLD STANDARD?”, SGJ, vol. 12, no. 2, pp. 203–216, Jun. 2020, doi: 10.52165/sgj.12.2.203-216.