Yves Bertot Venanzio Capretta Kuntal Das Barman Type-Theoretic Functional Semantics. 83-98 2002 conf/tphol/2002 TPHOLs http://link.springer.de/link/service/series/0558/bibs/2410/24100083.htm db/conf/tphol/tphol2002.html#BertotCB02