Bogunenko, M., O. Luppo, G. Argunov, S. Subbotin, and A. German. “CONCEPT-MODEL OF SEMI-DUPLEX VHF TRAINING STATION”. Proceedings of National Aviation University, vol. 79, no. 2, Aug. 2019, pp. 34-40, doi:10.18372/2306-1472.79.13829.