1. Schenk RK, Eggli PS, Hunziker EB. Articular cartilage morphology. In Kuettner KE, Schleyerbach R, Hascall VC, eds., Articular Cartilage Biochemistry. New York: Raven Press; 1986;3–23.
2. Schumacher BL, Block JA, Schmid TM, Aydelotte MB, Kuettner KE. A novel proteoglycan synthesized and secreted by chondrocytes of the superficial zone of articular cartilage. Arch Biochem Biophys 1994;311:144–152.
3. McCutchen CW. Lubrication of joints. In Sokoloff L, ed., The Joints and Synovial Fluid. London: Academic Press; 1980;438–483.
4. Hills BA. Boundary lubrication in vivo. Proc Inst Mech Eng [H] 2000;214:83–94.
5. Hunziker EB. Articular cartilage structure in human and experimental animal models. In Kuettner KE, Schleyerbach R, Hascall VC, eds., Articular Cartilage and Osteoarthritis. New York: Raven Press; 1992;183–199.