List of Articles amino acid digestibility Open Access Article Abstract Page Full-Text 1 - Amino Acid Digestibility and Energy Value of Bitter Vetch (a Cheap Plant Protein) and Effects of Feeding this Plant Protein on Production and Egg Quality Parameters of Leghorn and Native Layer Strain A.A. Saki M.A. Edris A. Janjan H. Mahmoudi A. Hoseini Siyar Open Access Article Abstract Page Full-Text 2 - Dietary Formulation with Poultry by-Product Meal on a Total Amino Acid vs. a Digestible Amino Acid Basis M. Jafari A. Mirzaei-Aghsaghali