@Misc{BVMC:657538, author = {Lange, Jean}, author = {Nicephorus, Callistus}, title = {Nicephori Callisti Xanthopuli..., Ecclesiasticae Historiae libri decem et octo...}, url = {https://www.cervantesvirtual.com/obra/nicephori-callisti-xanthopuli-ecclesiasticae-historiae-libri-decem-et-octo} }