00652naa#a2200181#i#450# EN\INFRA-M\bibl\122579 20260613093713.6 2500-0535 20260610b2026####ek#y0engy0150####ca ENG RU Waldmeier law for sunspot cycles: Statistical significance and implications for dynamo Journal article Moscow INFRA-M Academic Publishing LLC. 2026 4 с. Journal article local Солнечные пятна. 523.982 Цикличность солнечных пятен. 523.982.8 ENG Kitchatinov Leonid Leonidovich naukaru.ru