S. MUKHERJEE, S. B. MAJEE, and G. R. BISWAS, “FORMULATION AND IN VITRO CHARACTERISATION OF SOYBEAN OIL-HPMCK4M BASED BIGEL MATRIX FOR TOPICAL DRUG DELIVERY”, Int J App Pharm, vol. 11, no. 5, pp. 33–38, Sep. 2019.