Ricard Gavaldà, José L. Balcázar. Strong and Robustly Strong Polynomial-Time Reducibilities to Sparse Sets. Theoretical Computer Science, 88(1):1-14, 1991.
@article{GavaldaB91, title = {Strong and Robustly Strong Polynomial-Time Reducibilities to Sparse Sets}, author = {Ricard Gavaldà and José L. Balcázar}, year = {1991}, researchr = {https://researchr.org/publication/GavaldaB91}, cites = {0}, citedby = {0}, journal = {Theoretical Computer Science}, volume = {88}, number = {1}, pages = {1-14}, }