Mare Koit Sergei Litvak Haldur Oim Tiit Roosmaa Madis Saluveer Local And Global Structures In Discourse Understanding. 152-154 1983 EACL http://acl.ldc.upenn.edu/E/E83/E83-1026.pdf db/conf/eacl/eacl1983.html#KoitLORS83