Turkish Foundation of History (Turk tarih kurumi)
Academy of Medical Sciences
The Library of Congress LC WWW/Z39.50 Gateway
Research Center of the Islamic Consultative Parliament
Ministry of Science, Research and Technology 
Research Institute of Humanities and Cultural Studies
Dar-ul-Hadith Cultural Institute
National Center for Scientific Research (CNRS) of France
Center for Information and Scientific Documents of Iran
Islamic Culture and Relations Organization
Iranica Encyclopaedia
The Internet Encyclopedia of Philosophy
Meta-Encyclopedia of Philosophy
The Center for the Great Islamic Encyclopedia