1. 1. https://www.bbc.com/russian/international/2011/04/110404_us_plane_fatigue
2. A survey of serious aircraft accidents involving fatigue fracture;Campbell;Intern Journal of Fatigue 6(1),1984
3. 3. https://ru.wikipedia.org/wiki/Aviakatastrofy v SSSR.
4. 4. Hagemaier, D.J. (1991) Nondestructive testing developments in the aircraft industry. Materials Evaluation, 49(12), 1470-1478.
5. 5. Hagemaier, D.J. (1991) Application of crack detection to aircraft structures. In «Fatigue crack measurement: techniques and applications» (Eds K.J. Marsh, R.A. Smith and R.O. Ritchie). Warley (UK), EMAS, 419-455.