@book { EmploymentIssuesintheEuropeanUnion,
    title = "Employment Issues in the European Union",
    author = "Gustav {Dieckheuer} and Boguslaw {Fiedor}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1101568"
}