TY - CONF T1 - Non-atomic refinement in Z JO - FM'99-FORMAL METHODS, VOL II PY - 1999/09/17 AU - Derrick J AU - Boiten E ED - Wing JM ED - Woodchck J ED - Davies J VL - 1709 SP - 1477 EP - 1496 Y2 - 2025/01/13 ER -