1. Ānandajoti, Bhikkhu (2020, January 05). Patna Dhammapada: Patna Dhamma Verses (Transcribed by Margaret Cone). Available online: https://www.ancient-buddhist-texts.net/Texts-and-Translations/Patna-Dhammapada/index.htm.
2. Ānandajoti, Bhikkhu (2020, January 05). A Comparative Edition of the Dhammapada. Available online: https://www.ancient-buddhist-texts.net/Buddhist-Texts/C3-Comparative-Dhammapada/.
3. Andersen, Dines, and Smith, Helmer (1990). Sutta-nipāta, Pali Text Society. New ed.
4. Bernhard, Franz (1965). Udānavarga, Vandenhoeck & Ruprecht.
5. Boucher, Daniel J. (1996). Buddhist Translation Procedures in Third-century China: A Study of Dharmarakṣa and His Translation Idiom. [Ph.D. dissertation, University of Pennsylvania].