- The Heritage of Zarathushtra: A New Translation of His Gathas
- Zarathushtra and His Antagonists: A Sociolinguistic Study with English and German Translation of His Gathas (Sz)
- Herodotus's Scythians and Ptolemy's Central Asia: Semasiological and Onomasiological Studies
- The Sassanian Inscription of Paikuli: Part 2: Synoptic Tables
- The Sassanian Inscription of Paikuli: Part 3.1: Restored Text and Translation; Part 3.2. Commentary