Initially his reputation rested for the most part on his studies of Zoroastrianism, at first philology articles in academic journals, but most notably his book, "Zurvan, a Zoroastrian dilemma" (1955).
Initially his reputation rested on his studies of Zoroastrianism, at first philology articles in academic journals. He labored for many years on a scholarly book, his notable "Zurvan, a Zoroastrian dilemma" (1955).