John Campbell (2009), Vajra hermeneutics: A study of Vajrayana scholasticism in the "Pradipoddyotana", PhD Thesis accepted by Columbia University (Advisor: Robert Thurman), page 355 Christian K. Wedemeyer, Aryadeva's Lamp that Integrates the Practices (Caryamelapakapradlpa): The Gradual Path of Vajraydna Buddhism According to the Esoteric Community Noble Tradition, ed. Robert A. F. Thurman, Treasury of the Buddhist Sciences series (New York: The American Institute of Buddhist Studies at Columbia University, 2007), ISBN978-0975373453
