Peter Harry Eidorff Fritz Henglein Christian Mossin Henning Niss Morten Heine Sørensen Mads Tofte AnnoDomini: From Type Theory to Year 2000 Conversion Tool. 1-14 1999 POPL http://doi.acm.org/10.1145/292540.292543 db/conf/popl/popl99.html#EidorffHMNST99