Sabin A, Ramos-Alvarez M, Alvarez-Amezquita J, et al. Live, orally given poliovirus vaccine. Effects of rapid mass immunization on population under conditions of massive enteric infection with other viruses // Journal of the American Medical Association. — 1960. — Vol. 173, no. 14 (21 January). — P. 1521–1526. — DOI:10.1001/jama.1960.03020320001001. — PMID14440553 .
Sabin A, Ramos-Alvarez M, Alvarez-Amezquita J, et al. Live, orally given poliovirus vaccine. Effects of rapid mass immunization on population under conditions of massive enteric infection with other viruses // Journal of the American Medical Association. — 1960. — Vol. 173, no. 14 (21 January). — P. 1521–1526. — DOI:10.1001/jama.1960.03020320001001. — PMID14440553 .