Cards 2-10 are valued at their face value, face cards are worth 10, and aces interchange between either 1 or 11.
http://horsecity.ru/phpBB3/viewtopic.php?f=17&t=221283
https://www.ww2.site/forum/viewtopic.php?t=349982
https://gravatar.com/dreamily26b3879336
http://foro.murenacidos.com/showthread.php?tid=15255
https://muchroom.ng/index.php?topic=98393.new#new
http://60.250.226.63/ipkb/viewtopic.php?f=41&t=1934469
https://muchroom.ng/index.php?topic=22164.new#new
http://mirosovak.edoras.cz/viewtopic.php?f=3&t=564840
viewtopic.php?t=41149
http://horsecity.ru/phpBB3/viewtopic.php?f=25&t=270628