Media type: E-Article Title: ZUM ’98: The Z Formal Specification Notation: Designing a Requirements Specification Language for Reactive Systems Contributor: Leveson, Nancy G. imprint: Springer Berlin Heidelberg, 1998 Published in: ZUM ’98: The Z Formal Specification Notation Language: Not determined DOI: 10.1007/978-3-540-49676-2_10 ISSN: 0302-9743; 1611-3349 Origination: Footnote: