@book { ParolEvidenceRuleundMergerClausesiminternationalenEinheitsrecht,
    title = "Parol Evidence Rule und Merger Clauses im internationalen Einheitsrecht",
    author = "Sebastian {Kaufmann}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1097839"
}