Direct evidence that polysorbate-80-coated poly(butylcyanoacrylate) nanoparticles deliver drugs to the CNS via specific mechanisms requiring prior binding of drug to the nanoparticles - Kreuter, J; Ramge, P; Petrov, V; Hamm, S; Gelperina, S E; Engelhardt, B; Alyautdin, R; von Briesen, H; Begley, D J (Pharm Res, 2003)