Coloma Maguiña Ximena, Gallardo Vela Connie. 2020. “Use of Phytase and Chelated Mineral Supplementation on Productive Performance, Organs Weight and Indicators of Bone Mineralization in Broiler Chickens”. Revista Electronica De Veterinaria, September, 01 - 12. https://www.veterinaria.org/index.php/REDVET/article/view/88.