Ibáñez, S., y J. Mª. Suñé. 1970. «Experimental Study of PH in Dispersed Systems of Pharmaceutical Interest: I. Material, Methods Used and Orientation Tests». Ars Pharmaceutica (Internet) 11 (3-4):111-22. https://revistaseug.ugr.es/index.php/ars/article/view/9705.