1. C. M. Christensen: The Molds and Man, University of Minnesota Press, Minneapolis 3–22, 62 (1972).
2. A. R. Dochez and O. T. Avery: J. Exp. Med. 26, 447 (1917).
3. M. Heidelberger and O. T. Avery: J. Exp. Med. 38, 73 (1923).
4. M. Heidelberger: Forschr. Chem. Org. Naturstoffe 18, 504 (1960).
5. C.J. Lee: Biochemical aspects of the immunogenicity of pneumococcal polysaccharide vaccine. Special Lecture, 30th Anniversary Memorial Symposium, School of Pharmacy, National Taiwan University, p. 4 (1983).