J. A. Tekippe, Hristov, A. N., Heyler, K. S., Zheljazkov, V. D., Ferreira, J. F. S., Cantrell, C. L., and Varga, G. A.,
“Effects of plants and essential oils on ruminal in vitro batch culture methane production and fermentation”,
Can. J. Anim. Sci., vol. 92, pp. 395-408, 2012.