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"Len Doyal retires after 15 years"(PDF). The Bulletin: Queen Mary, University of London's newsletter for staff and students. No.34. Queen Mary University of London. March 2006. p.6. Archived from the original(PDF) on 25 April 2012.
"Len Doyal retires after 15 years"(PDF). The Bulletin: Queen Mary, University of London's newsletter for staff and students. No.34. Queen Mary University of London. March 2006. p.6. Archived from the original(PDF) on 25 April 2012.