1. Verster, TC., “P-N Junction as an Ultralinear Calculable Thermometer,” Electronic Letters, Vol. 4, pg. 175, May, 1968
2. Verster, TC., “The Silicon Transistor as a Temperature Sensor,” International Symposium on Temperature, 1971, Washington, D.C
3. Type 7D13 Plug-In Operating and Service Manual, Tektronix, Inc., 1971
4. Sheingold, D.H., “Nonlinear Circuits Handbook,” Chapter 3–1, “Basic Considerations,” pgs. 165–166, Analog Devices, Inc., 1974
5. Oscilloscope Trigger Circuits, “Automatic Trigger,” pgs. 39–49, Tektronix Concept Series, 1969