1. BARON, S., FRIEDMAN, R. M., KIRSCHSTEIN, R. L., BORMAN, G. L., MURRAU, R. AND HOTTLE, G. A. (1960) : Laboratory investigations of the attenuated poliovirus strains. II. Tissue culture characteristics before and after gastrointestinal passage. In Live Poliovirus Vaccines: Papers Presented and Discussions Held at the Second Internatioal Conference on Live Poliovirus, pp. 124-131. Pan American Sanitary Bureau.
2. BENYESH-MELNICK, M. AND MELNICK, J. L. (1959) : The use of in vitro markers and monkey neurovirulence tests to follow genetic changes in attenuated poliovirus multiplying in the human alimentary tract. in Live Poliovirus Vaccines: Papers Presented and Discussions Held at the First International Conference on Live Poliovirus Vaccines, pp. 179-198.Pan American Sanitary Bureau.
3. CABASSO, V. J., JUNGHERR, E. L., LEVINE, S., MOYER, A. W., ROCA-GARCÍA, M. AND COX, H. R. (1960) : Assessment of correlation between certain in vitro poliovirus markers and monkey neurovirulence. in Live Poliovirus Vaccines: Papers Presented and Discussions Held at the Second International Conference on Live Poliovirus Vaccines, pp. 31-38. Pan American Sanitary Bureau.
4. JAPAN LIVE POLIOVACCINE RESEARCH COMMISSION (1961) : Report of the Japanese Mission for the Survey of Poliomyelitis Control Programs Abroad. September 1961. (text in Japanese)
5. MELNICK J. L. AND BENYESH-MELNICK, M. (1960) : Problems associated with live poliovirus vaccine and its progeny after multiplication in man, in Live Poliovirus Vaccines: Papers Presented and Discussions Held at the Second International Conference on Live Poliovirus Vaccines, pp. 12-27. Pan American Sanitary Bureau,