@book { DerHandelskaufnachderSchuldrechtsreform,
    title = "Der Handelskauf nach der Schuldrechtsreform",
    author = "Marcus {Schaeffer}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1101918"
}