00520naa#a2200169#i#450# EN\INFRA-M\bibl\10623 20240829181356.4 2587-9111 20160218b2016####ek#y0engy0150####ca RUS RU The Results of the Research of Kondratiev Waves in Economies of Greece and Portugal Journal article Moscow INFRA-M Academic Publishing LLC. 2016 6 с. Journal article local Levkina Nataliya Nikolaevna naukaru.ru