Ramos, A. y Callao, V. (1967) «Study of the microbial mobilization of phosphates in the soil by percolation», Ars Pharmaceutica (Internet), 8(11-12), pp. 473–476. Disponible en: https://revistaseug.ugr.es/index.php/ars/article/view/7687 (Accedido: 17 mayo 2024).