J. C. P. Woodcock. Structuring specifications in Z. IEE Proceedings - Software, 4(1):51-66, 1989. [doi]
@article{Woodcock89, title = {Structuring specifications in Z}, author = {J. C. P. Woodcock}, year = {1989}, url = {http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=28090}, researchr = {https://researchr.org/publication/Woodcock89}, cites = {0}, citedby = {0}, journal = {IEE Proceedings - Software}, volume = {4}, number = {1}, pages = {51-66}, }