Counting in the Two Variable Guarded Logic with Transitivity.

Lidia Tendera Counting in the Two Variable Guarded Logic with Transitivity. 83-96 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3404&spage=83 2005 conf/stacs/2005 STACS db/conf/stacs/stacs2005.html#Tendera05