title: Time- or position-dependent diffusivity as a mechanism for regulating drug release from slab matrix systems: theoretical models.
mesh_terms: D002626:Chemistry, Pharmaceutical; D003692:Delayed-Action Preparations; D004058:Diffusion; D008962:Models, Theoretical; D004364:Pharmaceutical Preparations / Q000008:administration & dosage*
chemical_list: D003692:Delayed-Action Preparations; D004364:Pharmaceutical Preparations