TY - CONF T1 - Refinement of objects and operations in Object-Z JO - FORMAL METHODS FOR OPEN OBJECT-BASED DISTRIBUTED SYSTEMS IV PY - 2000/01/01 AU - Derrick J AU - Boiten E ED - Smith SF ED - Talcott CL VL - 49 SP - 257 EP - 277 Y2 - 2024/12/22 ER -