Citations

http://www.iranchamber.com/history/articles/sassanian_economy.php

http://en.wikipedia.org/wiki/Sassanid_Empire

http://www.ucalgary.ca/applied_history/tutor/islam/beginnings/sassanid.html

http://www.iranchamber.com/history/sassanids/sassanids.php

http://en.wikipedia.org/wiki/Khosrau_I#Philosopher_King

http://www.newworldencyclopedia.org/entry/Sassanid_Empire#cite_ref-Nicolle14_23-0

http://www.iranicaonline.org/articles/art-in-iran-v-sasanian

http://en.wikipedia.org/wiki/Fire_temple