References
- Astrup P Trolle D et al. Effect of moderate carbon-monoxide exposure on fetal development Lancet 1972 2 1220 1222
- Lichty JA Ting RY et al. Studies of babies born at high altitude Am J Dis Child 1957 93 666 678
- Suzuki K Horiguchi T et al. Pharmacologic effects of nicotine upon the fetus and mother in the rhesus monkey Am J Obstet Gynecol 1971 111 1092 1101