@book { MarketsSustainabilityandSocialWelfareEnhancementintheEuropeanUnion,
    title = "Markets, Sustainability and Social Welfare Enhancement in the European Union",
    subtitle = "12 th  and 13 th  Annual Conference of the Faculty of Economics and Business Administration- Sofia, October 9 to 10, 2009 and October 8 to 9, 2010",
    author = "George {Chobanov} and Jürgen {Plöhn} and Horst {Schellhaass}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-01684-0",
    url = "https://www.peterlang.com/document/1046828"
}