Monfared, Somayeh, Moradi, Zhaleh, Seraj, Shamsollah. An Analysis of Khwajah Nāṣīr al-Dīn Ṭūsī’s View on Existence- Quiddity Relation: Principiality of Existence or Principiality of Existent?. History of Philasophy. 2025;16(1):125-144. doi: