first reference:
Article in journal: Gonzalo Redin, Michaus (2013) ‘Guido Reni’s ‘Conversion of Saul’: a newly attributed painting in the Escorial’. The Burlington Magazine, Vol. 155, No. 1327, pp. 677-682 (6 pages)
second reference:
Article in journal: Nina A., Mallory, (1970). ‘Narciso Tomé’s “Transparente” in the Cathedral of Toledo (1721-1732)’. Journal of the Society of Architectural Historians, Vol. 29, No. 1, pp. 9–23 (14 pages)