@Misc{BVMC:252783, author = {Ruggeri Marchetti, Magda}, title = {Introducción a "Guillermo Tell tiene los ojos tristes"}, publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2008}, year = {2008}, url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmccz3p5} }