Coutinho Filho, Ubirajara, and Nilson Penha-Silva. 2006. “Influence of Urea on Stability of Invertase from Saccharomyces Cerevisiae”. Bioscience Journal 21 (2). Uberlândia, MG. https://seer.ufu.br/index.php/biosciencejournal/article/view/6592.