R. A. Puthuparampil, “THE MYSTERY OF THE TRIPLE GRADATED CHURCH: A Theological Analysis of the Kṯ āṯā DMassqāṯ ā (Book of Steps) with Particular Reference to the Writings of Aphrahat and John the Solitary”, AH, vol. 11, no. 01, pp. 203–210, Mar. 2017.