Warren T. K. Lee, Sophie S. F. Leung, Y. C. Xu, S. H. Wang, W. P. Zeng, Joseph Lau, Susan J. Fairweather-Tait,
Effects of double-blind controlled calcium supplementation on calcium absorption in Chinese children measured with stable isotopes (42Ca and 44Ca) British Journal of Nutrition. ,vol. 73, pp. 311- 321 ,(1995) ,
10.1079/BJN19950032