@book { MarkusderEvangelistundJngerdenJesusliebte,
    title = "Markus, der Evangelist und Jünger, den Jesus liebte",
    author = "Walter {Simonis}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1097793"
}