Charles Burnett and Dorian Geisler Greenbaum, The Winding Courses of the Stars (Culture and Cosmos Vol 11 no 1 and 2: Proceedings of the Warburg Institute Workshop on Ancient Astrology, March 2007), Culture and Cosmos, 2007, http:www.cultureandcosmos.com

Daryn Lehoux, Astronomy, Weather and Calendars in the Ancient World, Cambridge: Cambridge University Press, 2007, http://www.cambridge.org/catalogue/catalogue.asp?isbn=9780521851817

Anthony Aveni (ed), Foundations of New World Cultural Astronomy, Boulder: University Press of Colorado, 2008, http://www.upcolorado.com/bookdetail.asp?isbn=978-0-87081-900-1

Kim Malville, Guide to Prehistoric Astronomy of the South West, Boulder: Johnson Books, 2008, http://www.johnsonbooks.com/search.php?search=Malville