KALKAN, S. B. “CLASSIFICATION OF EUROPEAN UNION MEMBER AND CANDIDATE COUNTRIES ACCORDING TO EASE OF DOING BUSINESS INDEX USING FUZZY CLUSTERING”. Eurasian Eononometrics, Statistics and Emprical Economics Journal, no. 12, Feb. 2019, pp. 25-35, doi:10.17740/eas.stat.2019‐V12‐03.