There are however exceptions, such as the Zafarnama of Hamdu'llah Mustaufi a historically valuable continuation of the Shah-nama", Rypka, History of Iranian Literature, p.165 .

Jan Rypka, History of Iranian Literature.

History of Iranian Literature (D. Reidel, 1968).

The Uses of Classical Iranian Literature in Early Modern Azerbaijani Satire", International Conference on "The Middle Eastern Press as a Forum for Literature, Bamberg, Germany (October 2001)

Qatran's qasidehs on the earthquake of Tabriz in 1042 CE has been much praised and is regarded as a true masterpiece (Jan Rypka, History of Iranian Literature.

History of Iranian Literature, edited by Karl Jahn.

History of Iranian Literature.

Ancient Iranian Literature, Karachi, 1949.