Кучер, О.Г., and В.В. Харитон. “Determination of Vibration Characteristics of Blades of Gas Turbine Engines Contactless Method”. Proceedings of National Aviation University (archive) 31, no. 1 (January 1, 2007): 134–138. Accessed August 26, 2026. http://jrnl.kai.edu.ua/index.php/visnik/article/view/1452.