00642naa#a2200181#i#450# EN\INFRA-M\bibl\29972 20260130151411.5 2500-3313 20190716b2019####ek#y0engy0150####ca RUS RU Core system with concentrated masses as a calculated model of the spherical movement of the aircraft Journal article Moscow INFRA-M Academic Publishing LLC. 2019 9 с. Journal article local Инженерное дело. Техника в целом. Транспорт. 62 RUS samonov sergey anatol'evich naukaru.ru