1. Axelsson J (1949) The amount of produced methane energy in the European metabolic experiments with adult cattle. Kungl Lantbrukshogskolans Ann [Ann R Agric Coll Sweden] 16:404–419
2. Bairagi B, Mohini M (2003) Methane production and nutrient utilization at low levels of oil in diets of steers. Indian J Anim Prod Manage 19:84–89
3. Benchaar C, Pomar C, Chiquette J (2001) Evaluation of dietary strategies to reduce methane production in ruminants: a modelling approach. Can J Anim Sci 81:563–574
4. Bhar R, Lal M, Khan MY (1999) Nutrient utilization in crossbred dairy cows under economical feeding regime. Indian J Anim Nutr 16:358–361
5. Bibby J, Toutenburg H (1977) Prediction and improved estimation in linear models. Wiley, London