BIRKNEROVÁ, Zuzana - FRANKOVSKÝ, Miroslav. Social inteligence and machiavellism in managerial work of headmasters. In Journal of management and business : research and practice. - Prešov : Fakulta manažmentu Prešovskej univerzity, 2014. ISSN 1338-0494, 2014, roč. 6, č. 1, s. 19-31.