2) Donato, H., Jr. (1981): Age Pigment, Elsevier/Holland, New York, pp. 63-81.
3) Gallo-Torres, H. E. (1980): Transport and metabolism, in Vitamin E. A Comprehensive Treatise, ed. by Machlin, L. J., Marcel Dekker, New York, pp. 193-267.
5) Kinoshita, Y., Kimura, S., Takeshita, T., Kimura, E., Yukioka, M., and Morisawa, S. (1970): Isolation of heterogenous lymphocytes according to their cellular densities by multilayer centrifugation and detection of the separated fraction containing the immunological memory cells. Exp. Cell Res., 59, 299-306.