@book { BeobachtenmitallenSinnen,
    title = "Beobachten mit allen Sinnen",
    author = "Oliver {Jahraus} and Marcel {Schellong} and Simone {Hirmer}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1103704"
}