Warning: this is an htmlized version!
The original is here, and
the conversion rules are here.
This file:
  http://angg.twu.net/doria/README.html
  http://angg.twu.net/doria/README

See:
  http://angg.twu.net/doria/
  http://angg.twu.net/doria/tsuji98.pdf
  http://www.dimap.ufrn.br/pipermail/logica-l/2011-March/005395.html

(2011mar01)