@book { DiematerielleGltigkeitvoninternationalenGerichtsstandsvereinbarungen,
    title = "Die materielle Gültigkeit von internationalen Gerichtsstandsvereinbarungen",
    author = "Jeannette {Hamm}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b19035",
    url = "https://www.peterlang.com/document/1157692"
}