Andrew P. Black. Types for the working programmer (abstract). OOPS Messenger, 4(2):219, 1993.
@article{Black93, title = {Types for the working programmer (abstract)}, author = {Andrew P. Black}, year = {1993}, researchr = {https://researchr.org/publication/Black93}, cites = {0}, citedby = {0}, journal = {OOPS Messenger}, volume = {4}, number = {2}, pages = {219}, }