Rittmeister, Markus E, Philipp C Noble, James R Bocell Jr, Jerry W Alexander, Michael A Conditt, and Harold W Kohl III. 2002. “Components of Laxity in Interference Fit Fixation of Quadrupled Hamstring Grafts”. Acta Orthopaedica 73 (1):65-71. https://doi.org/10.1080/000164702317281431.