@book { LoveLessonsNachhilfefrsHerz,
    title = "Love Lessons - Nachhilfe fürs Herz",
    author = "Karin {Koenicke}",
    year = "2021",
    publisher = "via tolino media",
    address = "München, Deutschland",
    url = "https://tolino.openpublishing.com/document/1032584"
}