@Misc{BVMC:286641, author = {Clavius, Christophorus (S.I.)}, 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-2} }