Biomechanical evaluation of a new cross-pin technique for the fixation of different sized bone-patellar tendon-bone grafts. - Zantop,T.; Welbers,B.; Weimann,A.; Rummler,M.; Hedderich,J.; Musahl,V.; Petersen,W. (Knee Surg Sports Traumatol Arthrosc, 2004)