World Mind Sports Games Mind Sports Organisation "History | Uniting six federations of the traditional mind sports : Chess, Bridge, Draughts, Go and Xiangqi with over 400 National Associations and close to 500 million players". www.imsaworld.com.
Международная ассоциация интеллектуального спорта Логические игры Интеллектуальная игра Mah Jong now a full member of IMSA | Uniting six federations of the traditional mind sports : Chess, Bridge, Draughts, Go and Xiangqi with over 400 National Associations and close to 500 million players. (англ.) ?. www.imsaworld.com.