Lawrence T. Kou, C. K. Wong. A Note on the Set Basis Problem Related to the Compaction of Character Sets. Communications of the ACM, 18(11):656-557, 1975.
@article{KouW75, title = {A Note on the Set Basis Problem Related to the Compaction of Character Sets}, author = {Lawrence T. Kou and C. K. Wong}, year = {1975}, tags = {C++}, researchr = {https://researchr.org/publication/KouW75}, cites = {0}, citedby = {0}, journal = {Communications of the ACM}, volume = {18}, number = {11}, pages = {656}, }