@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}
}