1. Ramazzini B. The Latin text of 1713, rev. with translation and notes by W. C. Wright. Chicago: University of Chicago Press. 1940; De Morbis Anificum Diatriba. pp. 151–157.
2. Dupuyturen M. Rapport sur une espece de mephitisme des fosses d’aisance, produite par le gas azote. J Med. 1806;IX:187–213.
3. Hugo V. Les Miserables. Translated by L. Wraxall, illustrations by L. Ward. New York: The Heritage Press. 1938.
4. Nichollas P, Kim JK. Oxidation of sulphide by cytochrome aa3. Biochim Biophys Acta. 1981;637:312–20.
5. Mitchell CW, Davenport SJ. Hydrogen sulphide literature. Public Health Rep. 1924;39:1–13.