A Simple Theory of Expressions, Judgments and Derivations.

Masahiko Sato A Simple Theory of Expressions, Judgments and Derivations. 437-451 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3321&spage=437 2004 conf/asian/2004 ASIAN db/conf/asian/asian2004.html#Sato04