Chen, Zhuang; Everson, Michael; Lu, Qin; Sekiguchi, Masuhiro; Shih-Shyeng, Tseng; Wei, Lin-Mei; West, Andrew (27 September 2006), Proposal to encode Mahjong, Domino, and Draughts symbols in the UCS
Umamaheswaran, V. S. (26 July 2007), "M50.4c", Unconfirmed minutes of WG 2 meeting 50, Frankfurt-am-Main, Germany; 2007-04-24/27, Correcting the glyphs for 4 Mahjong Tiles and annotating the name for another Tile.