@Misc{BVMC:274003,
author = {Borja y Velasco, Gaspar de, Cardenal},
title = {[Carta del Card. Borja al Conde de Olivares, 20-08-1622].},
url = {https://www.cervantesvirtual.com/obra/carta-del-card-borja-al-conde-de-olivares-20-08-1622}
}