Barrack, Robert L, and Thomas Lyons. “Proximal Tibia--Extensor Mechanism Composite Allograft for Revision TKA With Chronic Patellar Tendon Rupture”. Acta Orthopaedica, vol. 71, no. 4, Jan. 2000, pp. 419-21, doi:10.1080/000164700317393457.