1Ernst van de Wetering, Rembrandt: The Painter at Work, University of California Press, 2000, Chapter VI.
2Samuel van Hoogstraten, Inleyding tot de hooge schoole der sahffderkonst. anders de ziahtbaere were#, Rotterdam. 1678. p.176.
3Janis C. Bell,"Some Seventeenth- Century Appraisals of Caravaggio's Coloring ", Artibus et Historiae, Vol. 14, No 27 (1993), p.124.
4Hellmut Wahl, The Aesthetics of Italian Renaissence Art, Cambridge University Press, 1999. p. 89.
5Ernst van de Wetering, Rembrandt: The Painter at Work, University of California Press, 2000, Chapter VII.
6Arnold Houbfaken, Groote Sohouburgh tier Nederlantsche Konstschilders en Schilderessen, Amsterdam 1753.vol. I. p. 259.
7Karel van Mander, Den grondt der ectet vry schilder-const, Haarlem 1604, republished with a translation and commentary by Hessel Miedema, Utrecht 1973, Chapter. Xll, line 5.
8Gridley Mckim-Smith,"Writing and Painting in the Age of Velazquez", Gridley Mckim-Smith et al, Examining velazquez. New Haven/London 1988. p.13.
9Arnold Houbraken, @roote Sohouburgh der Nederlantsohe Konstschilders en Schilderessen, Amsterdam 1753.voL I. p.273.
