Jin-yi Cai, Lane A. Hemachandra. Enumerative counting is hard. In Proceedings: Third Annual Structure in Complexity Theory Conference, Georgetown University, Washington, D. C., USA, June 14-17, 1988. pages 194-203, IEEE Computer Society, 1988. [doi]
@inproceedings{CaiH88, title = {Enumerative counting is hard}, author = {Jin-yi Cai and Lane A. Hemachandra}, year = {1988}, doi = {10.1109/SCT.1988.5279}, url = {http://dx.doi.org/10.1109/SCT.1988.5279}, researchr = {https://researchr.org/publication/CaiH88}, cites = {0}, citedby = {0}, pages = {194-203}, booktitle = {Proceedings: Third Annual Structure in Complexity Theory Conference, Georgetown University, Washington, D. C., USA, June 14-17, 1988}, publisher = {IEEE Computer Society}, isbn = {0-8186-0794-7}, }