@book { BeitrgezueinerTheoriederInteressenentwicklung,
    title = "Beiträge zu einer Theorie der Interessenentwicklung",
    author = "Hartmut {Kasten}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1079550"
}