Kenneth W. Regan. Unprovably intractable languages. In Proceedings of the Second Annual Conference on Structure in Complexity Theory, Cornell University, Ithaca, New York, USA, June 16-19, 1987. pages 69-80, IEEE Computer Society, 1987.
@inproceedings{Regan87, title = {Unprovably intractable languages}, author = {Kenneth W. Regan}, year = {1987}, researchr = {https://researchr.org/publication/Regan87}, cites = {0}, citedby = {0}, pages = {69-80}, booktitle = {Proceedings of the Second Annual Conference on Structure in Complexity Theory, Cornell University, Ithaca, New York, USA, June 16-19, 1987}, publisher = {IEEE Computer Society}, }