@book { DieTtigkeitvonSchulpsychologen,
    title = "Die Tätigkeit von Schulpsychologen",
    author = "Tobias {Greiner}",
    year = "2015",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-05876-5",
    url = "https://www.peterlang.com/document/1049555"
}