TY - JOUR T1 - Congruence from the operator’s point of view JO - Acta Informatica PY - 2020/10/01 AU - Gazda M AU - Fokkink W AU - Massaro V ED - DO - DOI: 10.1007/s00236-019-00355-5 PB - Springer Science and Business Media LLC VL - 57 IS - 3-5 SP - 329 EP - 351 Y2 - 2024/09/19 ER -