1. Goldwasser, S., Micali, S., Rackoff, C.: The Knowledge Complexity of Interactive Proof Systems. SIAM J. on Computing 18, 186–208 (1989)
2. Dwork, C., Naor, M., Sahai, A.: Concurrent Zero-Knowledge. In: Proc. of STOC 1998, pp. 409–418. ACM, New York (1998)
3. Canetti, R., Goldreich, O., Goldwasser, S., Micali, S.: Resettable Zero-Knowledge. In: Proc. of STOC 2000, pp. 235–244. ACM, New York (2000)
4. Canetti, R., Kilian, J., Petrank, E., Rosen, A.: Black-Box Concurrent Zero-Knowledge Requires ω(logn) Rounds. In: Proc. of STOC 2001, pp. 570–579. ACM, New York (2001)
5. Barak, B.: How to Go Beyond the Black-Box Simulation Barrier. In: Proc. of FOCS 2001, pp. 106–115 (2001)