@Misc{BVMC:266281,
author = {Vargas Llosa, Mario},
title = {Suma y resta [Resumen]},
publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2009},
year = {2009},
url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmcgq7f2}
}