Discussion paper: the qualitative analysis of partially specified systems.
D000818:Animals; D003491:Cybernetics; D003920:Diabetes Mellitus / Q000503:physiopathology; D005246:Feedback; D006801:Humans; D008433:Mathematics; D008954:Models, Biological; D010572:Pest Control, Biological; D013597:Systems Analysis; D014876:Water Pollution / Q000517:prevention & control