Barea Navarro, J. M. «Study on Soil Germs Capable of Mineralizing Organic Phosphates I.- Introduction and Bibliographic Review». Ars Pharmaceutica (Internet), vol. 10, n.º 3-4, febrero de 1969, pp. 117-28, https://revistaseug.ugr.es/index.php/ars/article/view/9653.