@Misc{BVMC:222915, author = {Sigüenza y Góngora, Carlos de}, title = {Libra astronómica y filosófica}, publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2005}, year = {2005}, url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmcdb8b8} }