@Misc{BVMC:709101, author = {Bécquer, Gustavo Adolfo}, title = {Your pupil is blue and, when you laugh... [Explanation in International Sign]}, publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2015}, year = {2015}, url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmct45m9} }