00610naa#a2200193#i#450# EN\\bibl\46864 20240419013542.5 1681-1208 20181225b2018####ek#y0engy0150####ca ENG RU An approach to finding an integral characteristic of ionospheric and lightning activity from WWLLN observational data Journal article Moscow Geophysical Center of the Russian Academy of Sciences 2018 7 с. Journal article local Kudryavtsev N G Kudin D V Uchaikin E O rjes.ru