Donner, Neal (1991), Sudden and Gradual Intimately Conjoined: Chih-i's Tíen-t'ai View. In: Peter N. Gregory (editor)(1991), Sudden and Gradual. Approaches to Enlightenment in Chinese Thought, Delhi: Motilal Banarsidass Publishers Private Limited
Hua, Hsuan (1977), The Shurangama Sutra, Volume 1, Dharma Realm Buddhist Association
Hurvitz, Leon (1962). Chih-i (538–597): An Introduction to the Life and Ideas of a Chinese Buddhist Monk. Mélanges Chinois et Couddhiques XII, Bruxelles: Institut Belge des Hautes Études Chinoises
Katō Bunno, Tamura Yoshirō, Miyasaka Kōjirō (tr.), (1975 ). The Threefold Lotus Sutra: The Sutra of Innumerable Meanings; The Sutra of the Lotus Flower of the Wonderful Law; The Sutra of Meditation on the Bodhisattva Universal Virtue, Weatherhill & Kōsei Publishing, New York & Tōkyō (Rissho Kosaikai) PDF