1. Blum, De Santis, Micali and Persiano: Non-Interactive Zero-Knowledge, SIAM Journal of Computing, vol.20, no.6, 1991.
2. G. Brassard, D. Chaum and C. Crépeau: Minimum Disclosure Proofs of Knowledge, JCSS.
3. Ben-Or, Goldreich, Goldwasser, Håstad, Killian, Micali and Rogaway: Everything Provable is Provable in Zero-Kowledge, Proc. of Crypto 88.
4. Bellare, Micali and Ostrovsky: The (true) Complexity of Statsitical Zero-Knowledge, STOC 90.
5. Lect Notes Comput Sci;I. Damgård,1989