Harper, G., Davis, S., Illum, L., Washington, C., & Harper, G. (1992). Studies on the interaction of charge-reversed emulsions with the reticuloendothelial system. International Journal of Pharmaceutics, 82(1-2), pp. 99-105. doi:10.1016/0378-5173(92)90078-G

Harper, Garry, S.S Davis, L. Illum, C. Washington, and G. Harper. "Studies On the Interaction of Charge-reversed Emulsions With the Reticuloendothelial System." International Journal of Pharmaceutics 82, no. 1-2 (1992): 99-105.

Harper, Garry, et al. "Studies On the Interaction of Charge-reversed Emulsions With the Reticuloendothelial System." International Journal of Pharmaceutics 82.1-2 (1992): 99-105.