Bayless, T. M. and N. S. Rosensweig. 1966. A racial difference in incidence of lactase deficiency: A survey of milk intolerance and lactase deficiency in healthy adult males. JAMA 197:968-972.
Bayless, T. M., B. Rothfeld, C. Massa, L. Wise, D. Paige and M. Bedine. 1975. Lactose and milk intolerance: Clinical implications. New Eng. J. Med. 292:1156-1161.
Bersen'eva, E. A., A. A. Inanov, T. P. Sansonova, E. M. Chernova and N. I. Oragvelidze. 1990. Microencapsulated aromatizers for tea. Pishchevaya Paomyshlennost, USSR 1:57-59.
Freund, O., J. Amedee, D. Roux and R. Laversanre. 2000. In vitro and in vivo stability of new multilamella vesicles. Life Sciences. 67:411-419.
Harris M. 1972. One man's food is another man's whitewash. Natural History 81(9):12-14.
Jackson, L. S. and K. Lee. 1991. Microencapsulated iron food fortification. J. Food Sci. 56:1047-1050.
Kim, C. H., K. W. Lee, S. C. Baick, H. S. Kwak and J. O. Kang. 1996. Studies on the microencapsulation of $\omega$-3 polyunsaturated fatty acid. Korean J. Food Sci. Technol. 28(4):743-749.
Kim, C. K., H. S. Chung, M. K. Lee, L. N. Choi and M. H. Kim. 1999. Development of dried liposomes containing $\beta$
-galactosidase for the dispersion of lactose in milk. Int. J. Pharm. 183:185-193.
Kretchmer, N. 1972. Lactose and lactase. Pages 35-43 in Scientific American Food. Hoff, J E and Janick J. eds. Freeman and Company. SF, USA.
Kwak, H. S., M. R. Ihm and J. Ahn. 2001. Microencapsulation of $\beta$-galactosidase with fatty acid esters. J. Dairy Sci. 84:1576-1582.
Kwak, H. S. and I. J. Jeon. 1988. Comparison of high performance liquid chromatography and enzymatic method to the measurement of lactose in milk. J. Food Sci. 53(3):975-976.
Kwak, H. S., K. M. Yang and J. Ahn. 2002. Microencapsulated iron for milk fortification. J. Food Sci. (in press).
Magee, E. L. Jr. and N. F. Olson. 1981. Microencapsulation of cheese ripening systems: Stability of microcapsules. J. Dairy Sci. 64:611-615.
Newcomer, A. and D. McGill. 1984. Clinical importance of lactase deficiency. New Eng. J. Med. 310:42-46.
Onwulata, C. I., D. R. Rao and P. Vankineni. 1989. Relative efficiency of yogurt, sweet acidophilus milk, hydrolyzedlactose milk and a commercial tablet in alleviating lactose maldigestion. Am. J. Clin. Nutr. 49:1233-1237.
Rao, D. R., C. B. Chawan and R. Veeramachaneni. 1995. Liposomal encapsulation of $\beta$
-galactosidase: Comparison of two methods of encapsulation and in vitro lactose digestibility. J. Food Biochem. 18:239-251.
Sankarikutty, B. M., M. Sreekumar, C. S. Nrayanan, and A. G. Mathew. 1988. Studies on microcapsulation of cardamon oil by spray drying technique. J. Food Sci. Technol., India. 25(6):352-356.
SAS. 1985. User's Guide: Statistics, Version 5 Edition. SAS Institute, Inc., Cary, NC.
Scrimshaw, N. S. and E. B. Murray. 1988. The acceptability of milk and milk products in populations with high prevalence of lactose intolerance. Am. J. Clin. Nutr. 48:1083-1159.
Shin, M. G., H. S. Kwak, P. S. Jang, B. K. Min, M. R. Yoo and D. C. Kim. 1995. Manufactures of spray solution containing microcapsulated lactase by milk fat. Korean patent. No. 088465.
Simmons, F. J. 1978. The geographic hypothesis and lactose malabsoprtion: A weighing of the evidence. Digest Dis. 23:963-967.
Solomon, N. W., A. M. Guerro and B. Torun. 1985. Dietary manipulation of postprandial colonic lactose fermentation. II. Addition of exogenous microbial $\beta$-galactosidase at meal time. Am. J. Clin. Nutr. 41:209-211.
Vandenberg, G. W., C. Drolet, S. L. Scott and J. Noue. (2001). Factors affecting protein release from alginate-chitosan coacervate microcapsules during production and gastric/intestinal simulation. J. controlled release. 77:297-307.