1. A. A. Inozemtsev and V. L. Sandratskii, Gas Turbine Engines (Aviadvigatel’, Perm, 2006).
2. V. A. Stepanov, ‘‘Development and research of methods and tools for complex diagnostics of lubricated friction units of gas turbine engines by the parameters of wear products in oil,’’ Doctoral Dissertation in Engineering (Moscow, 2000).
3. Emergency landing of Il-76 aircraft occurred due to chippings in oil system. http://www.aviaport.ru/digest/2007/04/16/119399.html. Cited October 5, 2011.
4. Cause of accident of An-24 was the chippings in engine oil. http://www.irk.ru/news/20110719/shavings/. Cited October 5, 2011.
5. A helicopter with rotation workers made an emergency landing because of chippings in oil in Krasnoyarsk. https://www.samara.kp.ru/daily/27103.4/4176351/. Cited October 5, 2011.