1. Metallic materials-Tensile testing-Part 1: Method of test at room temperature. ISO 6892-1:2009(E).
2. Aerospace series: Metallic materials-test methods-tensile testing at ambient temperature. EN 2002-001:2005 (E).
3. Zupeng Chen, Zhilong Ding, Xukexun, Yang Lu, A Strain Gauge Apparatus for Measuring Diameter and its Use Method: China Patent, CN101329159 [P], 2009.
4. Yang Lu, Huijun Hu, Ahenhua Li, Hua Lei, Lvrongkun, A Strain Gauge Type 2-D Extensometer and its Measuring Method: China Patent, CN102735539, 2012.
5. Yang Lu, Wentong Gao, Lvrongkun, A Measurement Method of the Diameters at the Fracture Cross-Section of the Tensile Test Pieces: China Patent, CN103994715 A, 2014.