@book{book, title  = {{Refinement in Z and Object-Z}},

 publisher = {{Springer Verlag}},

 url = {{}},

 year = {{2001}},

 month = {{1}},

 author = {{Derrick J and Boiten E}},

 isbn = {{9781852332457}},

 note = {{Accessed on 2024/12/26}}}