Alphabetically:
@Book{poole+2017, author = {David L. Poole and Alan K. Mackworth}, title = {Artificial Intelligence}, publisher = {{Cambridge} University Press}, year = 2017, edition = 2, subtitle = {Foundations of Computational Agents}, url = {https://artint.info/}, institution = {University of {British Columbia}}, keywords = {cs} }
@InProceedings{karp-1972, author = {Karp, Richard M.}, title = {Reducibility among Combinatorial Problems}, booktitle = {Symposium on the Complexity of Computer Computations}, year = 1972, doi = {10.1007/978-1-4684-2001-2_9}, keywords = {cs, proprietary} }
@InProceedings{cook-1971, author = {Cook, Stephen A.}, title = {The complexity of theorem-proving procedures}, booktitle = {Proceedings of the Third Annual {ACM} Symposium on Theory of Computing}, year = 1971, series = {STOC '71}, pages = {151–158}, address = {New York, NY, USA}, publisher = {Association for Computing Machinery}, isbn = 9781450374644, doi = {10.1145/800157.805047}, numpages = 8, location = {Shaker Heights, Ohio, USA}, keywords = {cs} }