@book { VideoberwachungvonArbeitnehmern,
    title = "Videoüberwachung von Arbeitnehmern",
    author = "Weiwen {Zhang}",
    year = "2018",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b12425",
    url = "https://www.peterlang.com/document/1110311"
}