00540naa#a2200193#i#450# EN\\bibl\85771 20241121190246.4 2658-3569 20171225b2017####ek#y0engy0150####ca ENG RU Construction of differential equations of allowable groups of transformations Journal article Moscow Electronic science 2017 0 с. Journal article local . 517.92 ENG Akimov A A Abdullina R I e-integral.ru