List of Articles Khwajah Nāṣīr al-Dīn Ṭūsī Open Access Article Abstract Page Full-Text 1 - An Analysis of Khwajah Nāṣīr al-Dīn Ṭūsī’s View on Existence- Quiddity Relation: Principiality of Existence or Principiality of Existent? Zhaleh Moradi Somayeh Monfared Shamsollah Seraj