From Dynamic Supertypes to Subjects: A Natural Way to Specify and Develop Systems.

William H. Harrison Haim Kilov Harold Ossher Ian Simmonds From Dynamic Supertypes to Subjects: A Natural Way to Specify and Develop Systems. 244-256 1996 35 IBM Systems Journal 2 db/journals/ibmsj/ibmsj35.html#HarrisonKOS96