1) Sibley, E.: Genetic variation and lactose intolerance. Am. J. Pharmacogenomics 4, 239-245 (2004)
2) Mattherws, S. B., Waud, J. P., Roberts, A. G., and Campbell, A. K.: Systematic lactose intolerance a new perspective on an old problem: Postgrad Med. J. 81, 167-173 (2005)
3) Lomer, M. C., Parkes, G. C., and Sanderson, J. D. : Review article lactose intolerance in clinical practice-myths and realities. Aliment. Pharmacol. Ther. 27, 93-103 (2008)