00537naa#a2200169#i#450# EN\\bibl\11507 20260215033547.7 2414-9047 20151231b2015####ek#y0engy0150####ca RUS RU Cluster policy as an element of the state system of strategic management by the example of the tourism cluster of the Smolensk region Journal article Moscow MOSCLUSTER LLC 2015 4 с. Journal article local Romchankova Yuliya naukaru.ru