Soltan, M., Mujalli, A., Mandour, M., & Abeer, M. E.-S. (2012). Effect of Dietary Rumen Protected Methionine and/or Choline Supplementation on Rumen Fermentation Characteristics and Productive Performance of Early Lactating Cows. Pakistan Journal of Nutrition, 11(3), 221–230. https://doi.org/10.3923/pjn.2012.221.230