1. Ufa train disaster. https://en.wikipedia.org/wiki/Ufa_train_disaster. Accessed December 25, 2020.
2. Silk, M.G. and Lidington, B.H., The potential of scattered or diffracted ultrasound in the determination of crack depth, Nondestr. Test., 1975, vol. 8, no. 6, pp. 146–151.
3. ISO 16828. Non-destructive testing. Ultrasonic testing. Time-of-flight diffraction technique as a method for detection and sizing of discontinuities, 2012.
4. ISO 10863. Non-destructive testing of welded joints. Ultrasonic method. Application of Time-of-Flight Diffraction (TOFD), 2011.
5. Ermolov, I.N., Diffraction-time control method, V Mire NK, 2001, no. 2 (12), pp. 7–11.