Boadi, D.A., K.H. Ominski, D.L. Fulawka, and K.M. Wittenberg (2004), Improving Estimates of Methane Emissions Associated with Enteric Fermentation of Cattle in Canada by Adopting an IPCC (Intergovernmental Panel on Climate Change) Tier-2 Methodology, Final report submitted to the Greenhouse Gas Division, Environment Canada, by the Department of Animal Science, University of Manitoba, Winnipeg, Manitoba, Canada.
Rapport préliminaire présenté à la Division des gaz à effet de serre, Environnement Canada, par la Direction générale de la recherche, Agriculture et Agroalimentaire Canada. ICF.