Кірчу, Ф., П. Кірчу, and Ю. Терещенко. “Characteristics of Transonic Axial Compressor Stages With Bifariamous Blade Rings Impeller and the Guide Device”. Proceedings of National Aviation University, vol. 36, no. 3, Mar. 2008, pp. 32-38, doi:10.18372/2306-1472.36.1586.