"Union Internationale des Sciences Préhistoriques et Protohistoriques/International Union for Prehistoric and Protohistoric Sciences, Proceedings of the XV World Congress (Lisbon, 4-9 September 2006)/Actes du XV Congrès Mondial (Lisbonne, 4-9 Septembre 2006) Vol. 27, Session C26."
Prehistoric art : signs, symbols, myth, ideology. ISBN 9781407306056. Published by Archaeopress in 2009. Publication and catalogue information, links to buy online and reader comments.