Ruxandra Gref, Domb, Avi , Quellec, Patricia , Blunk, Torsten , Müller, RH , Verbavatz, Jean-Marc , and Langer, Robert . 1995. “The Controlled Intravenous Delivery Of Drugs Using Peg-Coated Sterically Stabilized Nanospheres”. Advanced Drug Delivery Reviews, 16, 2-3, Pp. 215–233.