@book { DieEvolutiondesGleichheitssatzes,
    title = "Die Evolution des Gleichheitssatzes",
    author = "Carl Philip {Graf von Maldeghem}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1085661"
}