"A History of Ancient and Early Medieval India: From the Stone Age to the 12th Century" by Upinder Singh, Pearson Education India, 2008 [6]
""Ayodhya, Archaeology After Demolition: A Critique of the "new" and "fresh" Discoveries", by Dhaneshwar Mandal, Orient Blackswan, 2003, p.46 [7]
"A History of Ancient and Early Medieval India: From the Stone Age to the 12th Century" by Upinder Singh, Pearson Education India, 2008 p.364
Sailendra Nath Sen's Ancient Indian History and Civilization p.118
"The extremely hard emery of Armenia, which was under the Achaemenid hegemony, seems to be the closest natural source for polishing the Persepolis, Pasargadae, and Susā royal palace stones" Hunt, 2008 in "Tectonic Evolution, Collision, and Seismicity of Southwest Asia, Rasul Sorkhabi p.33
"For efficient polishing, Greeks used emery (Mohs 8) from the rich deposits of the Cycladic island of Naxos." in A Companion to Greek Art, published by Tyler Jo Smith, Dimitris Plantzos p.242
The Origins of Indian Stone Architecture, 1998, John Boardman pp. 13-22.
Devahuti, D. (1971). "Mauryan Art and the "Episode" Theory". Annals of the Bhandarkar Oriental Research Institute. 52 (1/4): 161–173. JSTOR41688719.
marg-art.org
Maharashtra, Marg Publications, 1985, p. 209 Pdf p. 2 "The surface of the inside walls are polished to a mirror-like finish, an exclusive characteristics of Mauryan architecture and sculpture, first derived through the media of Achaemenid art after the disintegration of the Persian Empire in AD 330 and the dispersal of skilled Persian and Perso-Greek artisans "
scribd.com
John Irwin, "The true chronology of Ashokan pillars", p.147
web.archive.org
Huntington, John C. and Susan L., The Huntington Archive - Ohio State University [5], accessed 30 August 2011.
