1. Hoffmann Karl,An Introduction to Stress Analysis and Transducer Design using Strain Gauges, (HBM 2012), available at http://www.hbm.com
2. HBM, Operating manualDigital precision measuring amplifier DMP40, DMP40S2
3. HBM, Operating manualBridge Calibration Unit for 225Hz BN100A
4. Inductive voltage divider calibration with sampling method