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. JSTOR986146. {{cite journal}}: Cite journal requires |journal= (help); Missing or empty |title= (help) Aulie, Richard P. “Boussingault and the Nitrogen Cycle.” Proceedings of the American Philosophical Society, vol. 114, no. 6, 1970, pp. 435–479. JSTOR, www.jstor.org/stable/986146
"Boussingault and the nitrogen cycle" "by Richard P. Aulie. -- Photocopy. Ann Arbor, Mich. : University Microfilms, 1970. Thesis (Ph.D.)--Yale University, 1968. Includes bibliographies."
Galloway, James N.; Leach, Allison M.; Bleeker, Albert; Erisman, Jan Willem (2013). "A chronology of human understanding of the nitrogen cycle". Philosophical Transactions of the Royal Society B: Biological Sciences. 368 (1621): 20130120. doi:10.1098/rstb.2013.0120. ISSN0962-8436.
