Internet, http://www.codart.nl/464/, 2011-06-08
Information trouvée : Alejandro Vergara, Conservateur de musée
LCNA (en ligne - Internet), 2000-07-11
Peter Paul Rubens, The life of Achilles / Friso Lammertse and Alejandro Vergara, 2003
Rubens and his Spanish patrons / Alexander Vergara, 1999