TY - CONF T1 - Testing refinements by refining tests JO - ZUM '98: THE Z FORMAL SPECIFICATION NOTATION PY - 1998/01/01 AU - Derrick J AU - Boiten E ED - Bowen JP ED - Fett A ED - Hinchey MG VL - 1493 SP - 265 EP - 283 Y2 - 2024/12/22 ER -