@Misc{BVMC:256604, author = {Constantino, VII, Emperador de Bizancio.}, title = {Constantini Porphyrogennetae Imperatoris Opera : in quibus Tactica nunc primùm prodeunt}, url = {https://www.cervantesvirtual.com/obra/constantini-porphyrogennetae-imperatoris-opera-in-quibus-tactica-nunc-primum-prodeunt-2} }