1. TML, Strain Gauges, Tokyo Sokki Kenkyujo Co., Ltd, TML Pam E-1007C;
2. TML, Strain Gauge-type Transducers, Tokyo Sokki Kenkyujo Co., Ltd, TML Pam E-2020B;
3. Hoffmann, Karl: An Introduction to Stress Analysis and Transducer Design using Strain Gauges, HBM, 2012.;
4. TML, Strain Gauge-type Civil Engineering Transducers, Tokyo Sokki Kenkyujo Co., Ltd, TML Pam E-720S;
5. Hoffmann, Karl: Applying the Wheatstone Bridge Circuit;