@Misc{BVMC:688043, author = {Clavius, Christoph}, title = {Christophori Clauii ... in Sphaeram Ioannis de Sacro Bosco commentarius}, url = {https://www.cervantesvirtual.com/obra/christophori-clauii--in-sphaeram-ioannis-de-sacro-bosco-commentarius} }