81 Sudokus with Chinese Characters (Kanji/Hanzi) - [Numerals 1-9]
Publishing games on digital portals: 10 ways I messed up (so you don’t have to) Yan Marchal, Sanuk Games.
Sudoku Game Design Language (SGDL) Sijue Tan Rongzheng Yan Yu Shao Yigang Zhang William Chan.
Sudoku Game Design Language (SGDL)