first reference:
Article in journal: Charles, G.Salas (2009). ‘Elements of a Ribera’. Getty Research Journal No 1., Published by: The University of Chicago Press. pp. 17-26 (10pages)
second reference:
Article in journal: Delphine Fitz Darby (Sep. 1957). ‘Ribera and the Blind Men’. The Art Bulletin Vol. 39, Published by: CAA. pp. 195-217 (29 pages)