@Book{BVMC:617361, author = {Enciso, Rodrigo de}, title = {Opusculum valde vtile De amicicia vera et ficta ac de eius signis}, url = {https://www.cervantesvirtual.com/obra/opusculum-valde-vtile-de-amicicia-vera-et-ficta-ac-de-eius-signis-} }