%0 Conference Proceedings %T Effect of peppermint (Mentha piperita) essential oil on in vitro gas production parameters of lucerne hay and cottonseed hulls %A E. Jani %A Danesh Mesgaran, Mohsen %A Vakili, Seyed Alireza %A Soleimani, Akbar %A Jahani Azizabadi, Hossein %J British Society of Animal Science %D 2010