Phonetic Association 33 (2): 261–265, doi:10.1017/S0025100303001385 Labrune, Laurence (2012), The Phonology of Japanese, Oxford, England: Oxford University Press
また、印刷実務では、C-アイ、M‐アカ、Y-キということも多い。 ^ Gatter, Mark (2004). Getting It Right in Print: Digital Pre-press for Graphic Designers. Laurence King Publishing. pp. 31. ISBN 1856694216