His other contributions include nearly 200 articles in the Encyclopaedia of Islam and some 100 articles in the Encyclopædia Iranica, as well as articles for Encyclopædia Britannica and Encyclopedia Americana.
Kontribusi lainnya adalah hampir 200 artikel di Encyclopaedia of Islam dan sekitar 100 artikel di Encyclopædia Iranica, serta artikel-artikel untuk Encyclopædia Britannica dan Encyclopedia Americana.