0 C. Manohar Janaky Narayanan 2012 Average packing factor approach for designing micelles, vesicles and gel phases in mixed surfactant systems Colloids and Surfaces A: Physicochemical and Engineering Aspects Elsevier 403 129-132 June 2012 packing parameter, lipid–detergent systems, cationic-anionic surfactant mixtures, vesicle-to-micelle transition, multivalent ion-surfactant systems