1. Tobey, G.E., Graeme, J.G., and Huelsman, L.P.: Operational amplifiers, design and applications, (McGraw-Hill 1971),Ch. 6, p. 225–227
2. Meiksin, Z.H., and Thackray, P.C.: Electronic design with off-the-shelf integrated circuits, (Parker 1980),Ch. 5, p. 195–199
3. Graeme, J.G.: Applications of operational amplifiers, (McGraw-Hill 1973),Ch. 3, p. 93–94