SHUBHAM MUKHERJEE; DIPANJANA ASH; GOPA ROY BISWAS; SUTAPA BISWAS MAJEE. COMPARATIVE STUDY OF SPAN 40 AND SPAN 60 BASED SOY-GELS FOR TOPICAL DRUG DELIVERY. Asian Journal of Pharmaceutical and Clinical Research, v. 12, n. 6, p. 259-265, 1 May 2019.