@book { BildungsurlaubPlanungProgrammundPartizipation,
    title = "Bildungsurlaub – Planung, Programm und Partizipation",
    author = "Steffi {Robak} and Horst {Rippien} and Lena {Heidemann} and Claudia {Pohlmann}",
    year = "2015",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-05915-1",
    url = "https://www.peterlang.com/document/1048803"
}