References
- Alexiev, К.П., Operational reliability of aviation power plants, Moscow, ed. Transport, 1976.
- Akimov, V.M., Fundamentals of reliability of gas turbine engines, Moscow, ed. Mechanical Engineering, 1981.
- Yames, А.В., The engine diagnostic system (EDS) — Summary Off results,USE — Airforsе Academy, Colorado, 1981.
- Kirov, V.K, Engineering and Aviation Support of Aviation.Sofia, military publishing, 2001.
- Marinov, A., Yordanov G., Sensors for recording flight parameters, Annual International Scientific Conference of the Faculty of Aviation 2019, collection of papers, 69-76 стр., ISBN 978-954-713-123-1.
- Manual for the Aviation Engineering Service of the Bulgarian Air Force.
- Аviation twin-circuit turbojet engine AI-25TL, Book 1, Technical Description.
- Malfunctions reporting cards.
- Complaint reports.
- Lists of defects found during repairs.
