https://www.lemon64.com/games/details.php?ID=1315
http://www.gb64.com/game.php?id=3799&d=18&h=0
https://www.gamesdatabase.org/game/commodore-64/international-karate
https://www.c64-wiki.com/wiki/International_Karate#Hints
https://en.wikipedia.org/wiki/International_Karate
ZZap nº 14
Commodore User June 1986