Georg Bühler (1898). On the Origin of the Indian Brahma Alphabet. K.J. Trübner. pp. 6, 14–15, 23, 29., Quote: "(...) a passage of the Lalitavistara which describes the first visit of prince Siddhartha, the future Buddha, to the writing school..." (page 6); "In the account of prince Siddhartha's first visit to the writing school, extracted by Professor Terrien de la Couperie from the Chinese translation of the Lalitavistara of 308 AD, there occurs besides the mention of the sixty-four alphabets, known also from the printed Sanskrit text, the utterance of the master Visvamitra,...."
Iravatham Mahadevan (2003). Early Tamil Epigraphy. Harvard University Department of Sanskrit and Indian Studies. pp. 91–94. ISBN978-0-674-01227-1.; Iravatham Mahadevan (1970). Tamil-Brahmi Inscriptions. State Department of Archaeology, Government of Tamil Nadu. pp. 1–12.
Siromony, Gift (January 1982). "The origin of the Tamil script". Tamil Studies. 8 (23). International Institute of Tamil Historical Studies.
doi.org
Coningham, R.A.E; Allchin, F.R.; Batt, C.M. (1996), "Passage to India? Anuradhapura and the early use of Brahmi Script", Cambridge Archaeological Journal, 6: 73–97, doi:10.1017/s0959774300001608, S2CID161465267
Mahadevan, Iravatham (1995). "From Orality to Literacy: The Case of the Tamil Society". Studies in History. 11 (2). SAGE Publications: 173–188. doi:10.1177/025764309501100201. S2CID162289944.
Vimala Begley (1993). "New investigations at the port of Arikamedu". Journal of Roman Archaeology. 6. Cambridge University Press: 93–108. doi:10.1017/S104775940001148X. S2CID162998667.
Coningham, R.A.E; Allchin, F.R.; Batt, C.M. (1996), "Passage to India? Anuradhapura and the early use of Brahmi Script", Cambridge Archaeological Journal, 6: 73–97, doi:10.1017/s0959774300001608, S2CID161465267
Mahadevan, Iravatham (1995). "From Orality to Literacy: The Case of the Tamil Society". Studies in History. 11 (2). SAGE Publications: 173–188. doi:10.1177/025764309501100201. S2CID162289944.
Vimala Begley (1993). "New investigations at the port of Arikamedu". Journal of Roman Archaeology. 6. Cambridge University Press: 93–108. doi:10.1017/S104775940001148X. S2CID162998667.