ZORKÓCIOVÁ, Otília - VANKOVÁ, Lucia. The Phenomenon of Social Networks and Effectiveness of Facebook Page Measuring (the Case of Slovakia). - Registrovaný: Scopus, Registrovaný: Web of Science. In Economic annals-XXI. - Kiev : Institute of Society Transformation, 2016. ISSN 1728-6239, 2016, vol. 160, no. 7-8, pp. 83-87 online. VEGA 1/0550/14.