1. Goodman, HM: Basic Medical Endocrinology, 3rd edn. Academic Press, New York (2003)
2. Albright, JA, Sauders, M: The Scientific Basis of Orthopaedics. Appleton and Lange, Norwalk (1990)
3. Marcus, R: Osteoporosis. Blackwell Sci., Oxford (1994)
4. Heersche, JNM, Cherk, S: Metabolic Bone Disease: Cellular and Tissue Mechanisms. CRC Press, Boca Raton (1989)
5. Isogai, YT, Akatsu, T, Ishizuya, T, Yamaguchi, A, Hori, M, Tokahashi, N, Suda, T: Parathyroid hormone regulates osteoblast differentiation positively or negatively depending on differentiation stages. J. Bone Miner. Res. 11, 1384-1393 (1996)