Boorman, Richard S, et al. “Ligament Grafts Become More Susceptible to Creep Within Days After Surgery: Evidence for Early Enzymatic Degradation of a Ligament Graft in a Rabbit Model”. Acta Orthopaedica, vol. 73, no. 5, Jan. 2002, pp. 568-74, doi:10.1080/000164702321022866.