Wells, John C. (2003). "Phonetic symbols in word processing and on the web"(PDF). In Solé, Maria-Josep; Recasens, Daniel; Romero, Joaquín (eds.). Proceedings of the 15th International Congress of Phonetic Sciences. Barcelona: International Phonetic Association. Archived(PDF) from the original on Oct 22, 2023.
Wells, John C. (2003). "Phonetic symbols in word processing and on the web"(PDF). In Solé, Maria-Josep; Recasens, Daniel; Romero, Joaquín (eds.). Proceedings of the 15th International Congress of Phonetic Sciences. Barcelona: International Phonetic Association. Archived(PDF) from the original on Oct 22, 2023.