00963nas 2200277zu 450 991105292820332120260113142156.02949-0618(CKB)44940074800041(EXLCZ)994494007480004120260113cuuuuuuuu || |engur|||||||||||Современная математика: Фундаментальные направленияRussian Federation: Peoples’ Friendship University of Russia (RUDN University)2413-3639 ordinary differential equationspartial differential equationsmathematical physicsreal and functional analysiscomplex analysisgeometryJOURNAL9911052928203321Современная математика: Фундаментальные направления4526145UNINA