00503naa#a2200169#i#450# EN\INFRA-M\bibl\9940 20241005203559.6 2587-9111 20151218b2015####ek#y0engy0150####ca RUS RU On the Results of Studying Kondratieff Waves in the Economy of Spain Journal article Moscow INFRA-M Academic Publishing LLC. 2015 5 с. Journal article local Levkina Nataliya Nikolaevna zh-szf.ru