@book { TherapieleichterAphasien,
    title = "Therapie leichter Aphasien",
    subtitle = "Materialien für die sprachliche Rehabilitation",
    author = "Berthold {Simons}",
    year = "2011",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1108044"
}