Peter Stansky's review of Linda Merrill's A Pot of Paint: Aesthetics on Trial in Whistler v. Ruskin in the Journal of Interdisciplinary History, Vol. 24, No. 3 (Winter, 1994), pgs. 536–7 [1]
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Bridgers, Jeff (June 20, 2013). "Whistler's Butterfly"(webpage). Retrieved April 29, 2014.