Tolong jelaskan mengenai Catatan dari Shaykh Ahmad

Amir-Moezzi, Mohammad Ali. "Une absence remplie de présences. Herméneutiques de l'occultation chez les Shaykhiyya (Aspects de l'imamologie duodécimaine VII)," in Bulletin of the School of Oriental and African Studies Vol. 64, No. 1. (2001), pp. 1–18.

Cole, Juan R.I. "The World as Text: Cosmologies of Shaykh Ahmad al-Ahsa'i," in Studia Islamica, No. 80. (1994), pp. 145–163.

Corbin, Henry. L'ecole Shaykhie en Theologie Shi`ite. Taban (Tehran: 1967).

Corbin, Henry. En islam iranien. Galimard (Paris: 1972), vol. 4.

MacEoin, Denis. S.V. "Ahsa'i, Shaikh Ahmad b. Zayn al-Din," in Encyclopaedia Iranica, 3 vols. - (London: Routledge and Kegan Paul, 1983 - ).

MacEoin, Denis. The Messiah of Shiraz. Brill (Leyden, 2008).

Hamid, Idris Samawi. The Metaphysics and Cosmology of Process According to Shaykh Ahmad al-Ahsa'i. (Ph.D. dissertation: State University of New York at Buffalo, 1998).

Rafati, Vahid (1979). The Development of Shaykhi Thought in Shi`i Islam. Ph.D. dissertation, University of California, Los Angeles.