Klimkiewicz JJ, Samsell BJ, Riff A, DeBerardino TM, Moore MA. Comparison of human tendon allografts and autografts used in knee reconstruction. Curr Orthop Pract. 2011 Nov;22(6):494-502. doi: 10.1097/BCO.0b013e318236c466
Williams VSL, Wakeford ME. The predictive validity of the National Teacher Examinations for performance in teacher education programs. Educ Psychol Meas. 1993;53(2):533-9. doi: 10.1177/0013164493053002023