Samkov, Alexei, Galyna Suslova, Vladimir Litvinenko, and Yurii Zakharchenko. “Methodological Aspects of Aeronautical System Upgrade”. Aviation 14, no. 4 (December 31, 2010): 104-111. Accessed December 23, 2024. https://transport.vilniustech.lt/index.php/Aviation/article/view/5686.