1. 1Available from: http://www.reviewpainting.com/History-of-painting.htm (accessed on 30 July 2009).
2. 2Available from: http://www.historyworld.net/wrldhis/PlainTextHistories.asp?historyid=ab20 (accessed on 30 July 2009).
3. 3Available from: http://www.historyworld.net/wrldhis/PlainTextHistories.asp?groupid=1322&HistoryID=ab20>rack=pthc (accessed on 30 July 2009).