Theoretical analysis of drug release into a finite medium from sphere ensembles with various size and concentration distributions

A simple equation for description of solute release I. Fickian and non-fickian release from non-swellable devices in the form of slabs, spheres, cylinders or discs

Philip L. Ritger, Nikolaos A. Peppas · Journal of Controlled Release · 1987 · 3.7K citations

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Novel Approach to Zero-order Drug Delivery Via Immobilized Nonuniform Drug Distribution in Glassy Hydrogels

Ping I. Lee · Journal of Pharmaceutical Sciences · 1984 · 124 citations

Pharmacy, Biomedical Engineering, Pharmaceutics +13

Finite element analysis of diffusional drug release from complex matrix systems. I.

Ya Zhou, Xiao Yu Wu · Journal of Controlled Release · 1997 · 92 citations

Pharmacy, Materials Engineering, Pharmaceutics +14

Drug release from an ensemble of swellable crosslinked polymer particles

Mario Grassi, I. Colombo, Romano Lapasin · Journal of Controlled Release · 2000 · 87 citations

Pharmacy, Pharmaceutics, Drug Delivery +13

Initial concentration distribution as a mechanism for regulating drug release from diffusion controlled and surface erosion controlled matrix systems

Ping I. Lee · Journal of Controlled Release · 1986 · 83 citations

Pharmacy, Bioengineering, Pharmaceutics +17