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2. J. Sjövall, in “New Biochemical Separations” (A. T. James and L. J. Morris, eds.), p. 68, Van Nostrand, Princeton (1964).
3. J. Sjövall, in “Biomedical Applications of Gas Chromatography” (H. A. Szymanski, ed.), p. 151, Plenum Press, New York (1964).
4. A. F. Hofmann, in “New Biochemical Separations” (L. J. Morris and A. T. James, eds.), p. 362, Van Nostrand, Princeton (1964).
5. H. Van Belle, “Cholesterol, Bile Acids and Atherosclerosis,” North-Holland, Amsterdam (1965).