AGA Rules Summary [online], British Go Association, wrzesień 2007 [dostęp 2024-07-20](ang.).
RonR.BellRonR., AGA Rules Summary [online], British Go Association, 2007 [dostęp 2024-09-01], Cytat: Area counting may only be used by prior agreement between both players. It will
give exactly the same game result as the Territory Counting rules above(ang.).
AnttiA.TörmänenAnttiA., Area or territory – A brief history of go rules [online], 7 sierpnia 2020 [dostęp 2024-07-28], Cytat: Around year 700, when the Chinese were still using territory scoring, go spread to Japan, and so the Japanese also came to play go with territory scoring(ang.).
AnttiA.TörmänenAnttiA., Area or territory – A brief history of go rules [online], 7 sierpnia 2020 [dostęp 2024-07-28], Cytat: The Japanese then gradually altered the rules of the game, for example abolishing (...) the group tax. The latter was a byproduct of stone scoring: originally, only living scores counted towards a player’s score, so in the end the board was filled with stones; but every group has to leave two empty intersections for its eyes. Therefore, when the ‘group tax’ applies, every group costs a player two points(ang.).
AnttiA.TörmänenAnttiA., Area or territory – A brief history of go rules [online], 7 sierpnia 2020 [dostęp 2024-07-28], Cytat: [Group tax] made the territory scoring process more convoluted, which is probably the main reason why it was abolished(ang.).
