00636naa#a2200181#i#450# EN\\bibl\47366 20240427194639.6 1812-9498 20211130b2021####ek#y0engy0150####ca RU Designing unmanned aircraft frame using composite materials Journal article Astrakhan Astrakhan State Technical University 2021 7 с. Journal article local Инженерное дело. Техника в целом. Транспорт. 62 Rukavitsyn Alexander Nikolaevich Martinez Leon Andreas Santiago vestnik.astu.org