00612naa#a2200181#i#450# EN\INFRA-M\bibl\100194 20260202021325.1 2500-0535 20250626b2025####ek#y0engy0150####ca ENG RU Studying the radial structure of the poloidal Alfvén resonator by the method of phase portraits from Van Allen Probes satellite data Journal article Moscow INFRA-M Academic Publishing LLC. 2025 8 с. Journal article local Физика. 53 ENG Vlasov Aleksandr Aleksandrovich zh-szf.ru