@book { BegrndungderEthikbeiBarthundElert,
    title = "Begründung der Ethik bei Barth und Elert",
    author = " {Chan-Ho Yang}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1105499"
}