1. Organic and inorganic amendments to reduce ammonia losses from liquid hog manure;Al-Kanani;Journal of Environmental Quality,1992
2. A farm-scale study on the use of clinoptilolite zeolite and De-Odorase® for reducing odour and ammonia emissions from broiler houses;Amon;Bioresource Technology,1997
3. Effect of energy density in the diet and milking frequency on plasma metabolites and hormones in early lactation dairy cows;Andersen;Journal of Veterinary Medicine Series A,2004
4. Armstrong K A; Burns R T; Walker F R; Wilhelm L R; Raman D R (2003). Ammonia concentrations in poultry broiler production units treated with liquid alum. Proceedings of the Air Pollution from Agriculture Operations III, Research, pp 116–122, Triangle Park, North Carolina
5. Arogo J; Westerman, P W; Heber A J; Robarge W P; Classen J J (2006). Ammonia emissions from animal feeding operations. In: Animal Agriculture and the Environment: National Center for Manure and Animal Waste Management White Papers (J. M. Rice, D. F. Caldwell, F. J. Humenik, eds.), pp 41–88, ASABE, St. Joseph, MI