Krželj-Čolović, Z., I. Mihajlović, and I. Milić-Beran. “CLUSTERIZATION – A FACTOR OF EFFICIENCY IN SMALL AND MEDIUM HOSPITALITY ENTERPRISES”. Ekonomski vjesnik/Econviews - Review of Contemporary Business, Entrepreneurship and Economic Issues, vol. 29, no. 2, Dec. 2016, pp. 367-80, https://hrcak.srce.hr/ojs/index.php/ekonomski-vjesnik/article/view/3968.