,
Springer
Lecture Notes in Computer Science
International Symposium on Theoretical Aspects of Computer Science
Quantum Computing and Advanced System Research

Buhrman, H., Fenner, S., Fortnow, L.& van Melkebeek, D. (2000). Optimal proof systems and sparse sets. Proceedings of International Symposium on Theoretical Aspects of Computer Science 2000, 407–418.