PIOVARČIOVÁ, Veronika. Development of economic systems - impulses and alternatives. In Eurasian Multidisciplinary Forum, EMF 2013 : proceedings vol.1, 24-26 October 2013, Tbilisi, Georgia. - Kocani : European Scientific Institute, 2013. ISBN 978-608-4642-10-7, p. 280-284. VEGA 338.