1. Hoffstein, J., Graham, N., Pipher, J., Silverman, J., Whyte, W.: NTRUSign: Digital signatures using the NTRU lattice. Draft 2, NTRU Cryptosystem Inc. (2002). Available at: www.sisecure.com/cryptolab/pdf/NTRUSign-preV2.ps
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4. Consortium for Efficient Embedded Security. Efficient Embedded Security Standard (EESS)#1: Implementation Aspects of NTRUEncrypt and NTRUSign (2003). Available at http://grouper.ieee.org/groups/1363/lattPK/submissions/EESS1v2.pdf
5. Hoffstein, J., Pipher, J., Silverman, J.: NSS: an NTRU lattice-based signature scheme. In: Proc. of EUROCRYPT’01, LNCS 2045, pp. 211–228. Springer (2001)