1. Kate Sharpe, Tertia Barnett, Sara Rushton, England's Rock Art: the prehistoric rock art of england: recording, managing and enjoying our carved heritage, English Heritage, England, 2008.
2. L’Art Rupestre – Rock Art. A Universal Cultural Message;Clottes,1997
3. The Rock Art Stability Index;Dorn;Heritage Management,2008
4. Stone by Stone: A Guide to Building Stone in the Northern Ireland Environment;Curran,2010
5. The use of weathering indices in rock art science and archaeology;Bednarik;Rock Art Science,2012