00494naa#a2200169#i#450# EN\INFRA-M\bibl\9878 20250125221632.6 2500-3313 20151025b2015####ek#y0engy0150####ca RUS RU Collection of tasks on the theoretical mechanics. Overview Journal article Moscow INFRA-M Academic Publishing LLC. 2015 0 с. Journal article local Kirsanov Mikhail Nikolaevich zh-szf.ru