@book { MarketingintheDigitalEra,
    title = "Marketing in the Digital Era",
    author = "Zuzana {Bačíková}",
    year = "2018",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b14227",
    url = "https://www.peterlang.com/document/1055937"
}