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J. Scott Armstrong (1978). "The Graffiti Solution"(PDF). The Wharton Magazine. Archived from the original(PDF) on 20 June 2010. Retrieved 23 January 2012.
D.E. Funk (7 October 2013). "Banksy the Artist". www.Medium.com. Medium-All things art. Archived from the original on 21 October 2022. Retrieved 21 October 2022.