Ahmadreza Biabani and Yahya Talebian. "An Analysis of Orientational Metaphor and Conceptual Framework in Shamlu's Poetry." Literary Criticism Research Journal, Vol. 1, No. 1, pp. 99-126 [In Persian].
Ali Dashti. A Portrait of Nasir Khusraw. Edited by Mehdi Mahoozi, Tehran: Javidan [In Persian].
Ali-Asghar Halabi. History of Philosophy in Iran and the Islamic World. Tehran: Asatir [In Persian].
Balkis Roshan and Leila Ardabili. An Introduction to Cognitive Semantics. Tehran: Elm [In Persian].
Behrouz Sarvatian. Expression in Persian Poetry. Tehran: Sooreh Mehr [In Persian].
Cyrus Shamisa. Stylistics of Poetry. Tehran: Ferdows [In Persian].
Edward Browne. A History of Persian Literature. Tehran: Pocket Books Company [In Persian].
Ibn Qutaybah, Abdullah ibn Muslim. 'Uyun al-Akhbar. Cairo: Dar al-Kutub wa al-Watha'iq.
Mahdi Mohaqqeq. "Some Philosophical Terms in Nasir Khusraw's Poetry." Persian Language and Literature Research Journal, No. 9, pp. 1-16 [In Persian].
Mahdi Safari. "Comparative Study of Religious Teachings in the Poetry of Abi al-Atahiya and Nasir Khusraw." Persian Language and Literature, Islamic Azad University, Sanandaj Branch, No. 31, pp. 10-22 [In Persian].
Mohammad Taheri Mobarakeh and Ali Rafatnia. "Ismaili Terms in Nasir Khusraw's Works." Persian Literature Quarterly, Mashhad Islamic Azad University, Nos. 15-16, pp. 213-243 [In Persian].
Mohammad-Hadi Ma'rifat. Al-Tafsir wa al-Mufassirun fi Thawb al-Qashib. Mashhad: Al-Jami'ah al-Radhawiyyah [In Persian].
Mohammad-Hossein Dhahabi. Al-Tafsir wa al-Mufassirun. Beirut: Dar Ihya' al-Turath.
Mohammad-Ali Sabuni. Al-Tibyan fi 'Ulum al-Qur'an. Beirut: 'Alam al-Kutub.
Nasir Khusraw Qubadiyani. Divan of Nasir Khusraw. Tehran: Negah [In Persian].
Salmiyah. Five Ismaili Treatises, Syria: N/A.
Taqi Pournamdarian. Journey in the Mist (A Factor in Ahmad Shamlu's Poetry). Tehran: Zemestan [In Persian].
Zabihullah Safa. A History of Persian Literature, 10th ed., Tehran: Ferdows [In Persian].
Zahra Rafiei. Rationalism in the Poems of Nasir Khusraw and Abu al-'Ala Ma'arri, Anar Islamic Azad University [In Persian].
Zein al-Abedin Motamen. Evolution of Persian Poetry. Tehran: Tahuri [In Persian].