@book { InstitutionsofHanseaticTrade,
    title = "Institutions of Hanseatic Trade",
    subtitle = "Studies on the Political Economy of a Medieval Network Organisation",
    author = "Ulf Christian {Ewert} and Stephan {Selzer}",
    year = "2016",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Deutschland",
    doi = "10.3726/978-3-653-05851-2",
    url = "https://www.peterlang.com/document/1067669"
}