Teshima, Ryota, et al. “Effects of Weight Bearing on the Tidemark and Osteochondral Junction of Articular Cartilage: Histomorphometric Analyses of 7 Normal Femoral Heads”. Acta Orthopaedica, vol. 70, no. 4, Jan. 1999, pp. 381-6, doi:10.3109/17453679908997828.