M. W. Shields. Implicit System Specification and the Interface Equation. Comput. J., 32(5):399-412, 1989.
@article{Shields89, title = {Implicit System Specification and the Interface Equation}, author = {M. W. Shields}, year = {1989}, researchr = {https://researchr.org/publication/Shields89}, cites = {0}, citedby = {0}, journal = {Comput. J.}, volume = {32}, number = {5}, pages = {399-412}, }