1. Ugolev, A.M., De Laey, P., Iezuitova, N.N.,et al, Membrane Digestion and Nutrient Assimilation in Early Development,Development of Mammalian Absorption Processes, Elliot, K. and Whelan, J., Eds., Amsterdam etc., 1979, pp. 221–240.
2. Koldovsky, O., Development of Human Gastrointestinal Functions; Interaction of Changes in Diet Composition, Hormonal Maturation, and Genetic Programming,J. Amer. College Nutr., 1984, vol. 3, pp. 131–138.
3. Henning, S.J., Functional Development of the Gastrointestinal Tract, Physiology of the Gastrointestinal Tract, Johnson, L.R., Ed., New York, 1987, pp. 285–301.
4. Ugolev, A.M.,Teoriya adekvatnogo pitaniya i trofologiya (Theory of Adequate Nutrition and Trophology), Leningrad, 1991.
5. Ugolev, A.M., Timofeeva, N.M., Egorova, V.D., and Nikitina, A.A., A Detailed Characteristic of Enzyme Spectrum in Small Intestine of Rats at Early Postnatal Period,Fiziol. Zh., 1992, vol. 78, no. 8, pp. 21–28.