@Book{BVMC:243187,
author = {Vega, Lope de},
title = {La firmeza en la desdicha : comedia famosa},
publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes ; Madrid : Biblioteca Nacional, 2007},
year = {2007},
url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmczs2s3}
}