1. Heinlein, W., and Holmes, H.: Active filters for integrated circuits, (Prentice-Hall, London 1974)
2. Moschytz, G.S.: Linear integrated networks: design, (van Nostrand Reinhold, New York 1975)
3. Moschytz, G.S., and Horn, P.: Active filter design handbook, (Wiley, New York 1981)