@Misc{BVMC:254212,
author = {Pérez de Mesa, Diego},
title = {Comentarios de sphera},
publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes ; Madrid : Biblioteca Nacional, 2009},
year = {2009},
url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmchx1t7}
}