Spengler, W.F. & W.G. Sayles. Turkoman Figural Bronze Coins and Their Iconography. (Lodi, 1992).
Volume I - Artuqids
Volume II - Zengids and Ayyubids
Volume III - Danshmendids, Seljuqs of Rum, Mongols and lesser dynasties.
A complete catalog of types. It draws information from a great variety of sources, lists every known figural bronze coin type of the Turkoman dynasties, and unveils several previously unpublished types. In addition to the numismatic technical details, all of which are important to a collector of the the series, this book includes a substantial amount of historical and art historical information which is derived from the coins themselves. It is of great utility to the collector, attributing numismatist, historian and art historian as well as to certain members of the scientific community.