Li et al. (2018)
Also: Li et al. 2018
Effects of fumaric acid supplementation on methane production and rumen fermentation in goats fed diets varying in forage and concentrate particle size.
Li, Z., Liu, N., Coa, Y., Jin, C., Li, F., Cai, C., Yao, J. (2018). Effects of fumaric acid supplementation on methane production and rumen fermentation in goats fed diets varying in forage and concentrate particle size. Journal of Animal Science and Biotechnology, 9(21). [link to paper]
https://doi.org/10.1186/s40104-018-0235-3
References
All IPCC definitions taken from Climate Change 2007: The Physical Science Basis. Working Group I Contribution to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Annex I, Glossary, pp. 941-954. Cambridge University Press.