L. Li, T. Yi, and C. W.- kei Lam, “Inhibition of Human Efflux Transporter ABCC2 (MRP2) by Self-emulsifying Drug Delivery System: Influences of Concentration and Combination of Excipients”, J Pharm Pharm Sci, vol. 17, no. 4, pp. 447–460, Oct. 2014.