Lyssakov, Nikolay D., and Elena N. Lyssakova. “Relevant Tasks of Professional Orientation in Aviation Specialties: Aircraft Engineering and Flight Operation”. Amazonia Investiga 8, no. 21 (August 31, 2019): 468–473. Accessed November 3, 2025. https://mail.amazoniainvestiga.info/index.php/amazonia/article/view/125.