@book { DieGeschichtederbeobachtendenEmbryologie,
    title = "Die Geschichte der beobachtenden Embryologie",
    author = "Änne {Bäumer-Schleinkofer}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1081701"
}