Tibial tunnel angle and bone implant designs: Arthroscopic posterior cruciate ligament tibial inlay reconstruction technique 
Jiang Xue-feng, Yang Hui-guang, Zhang Yun-qing, Xu Jun, Huang Guo-wei, Ren Ya-jun, Sun Hui-qing
Chinese Journal of Tissue Engineering Research . 2010, (30): 5527 -5530 .  DOI: 10.3969/j.issn.1673-8225.2010.30.005