[1]
P. Christensen, J. Kjær, O. Sneppen, P.-S. Vang, F. Melsen, and H. E. Nielsen, “The Subchondral Bone of the Proximal Tibial Epiphysis in Osteoarthritis of the Knee”, ActaO, vol. 53, no. 6, pp. 889–895, Jan. 1982.