Карпов E. H., Е. А. Сикорский, and Якушенко A. C. “Evaluation of Calendar lifetime’s Influence of Engines АШ-62ИР on Their Technical State”. Proceedings of National Aviation University, vol. 3, no. 2, Sept. 1999, pp. 24-28, doi:10.18372/2306-1472.3.9012.