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Keny, Liladhar (1943). “"THE SUPPOSED IDENTIFICATION OF UDAYANA OF KAUŚĀMBI WITH UDAYIN OF MAGADHA"”. 《Annals of the Bhandarkar Oriental Research Institute》 24 (1/2): 60–66. JSTOR41784405.
Roy, Daya (1986). “SOME ASPECTS OF THE RELATION BETWEEN ANGA AND MAGADHA (600 B.C.—323 B.C.)”. 《Proceedings of the Indian History Congress》 47: 108–112. JSTOR44141530.
Witzel, Michael (1997). “Macrocosm, Mesocosm, and Microcosm: The Persistent Nature of 'Hindu' Beliefs and Symbolic Forms”. 《International Journal of Hindu Studies》 1 (3): 501–539. doi:10.1007/s11407-997-0021-x. JSTOR20106493.
Tatz, Mark (1987). “The Life of the Siddha-Philosopher Maitrīgupta”. 《Journal of the American Oriental Society》 107 (4): 695–711. doi:10.2307/603308. JSTOR603308.