@book { Electroniccommerceasaninstrumentofinternationalbusinessactivity,
    title = "Electronic commerce as an instrument of international business activity",
    author = "Julia {Todorova}",
    year = "2004",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832476496",
    url = "https://m.diplom.de/document/222923"
}