01014nas 2200361 a 450 99620638780331620240413020438.01608-3083(OCoLC)47189610(CKB)954926941724(CONSER) 2008233645(DE-599)ZDB2031092-4(MiAaPQ)54032(EXLCZ)9995492694172420010625a19659999 sy aengurmnu|||||txtrdacontentcrdamediacrrdacarrierDifferential equations[Moscow, Russia] MAIK Nauka/InterperiodicaRefereed/Peer-reviewed0012-2661 Differential equationsPeriodicalsÉquations différentiellesPériodiquesDifferential equationsÉquations différentielles515.35JOURNAL996206387803316Differential equations82801UNISA