Polly two - a public key cryptosystem based on Polly cracker. - Van-Ly Le (2003)

How to Embed Short Cycles into Large Nonlinear Feedback-Shift Registers. - Van-Ly Le; Werner Schindler (SCN, 2004)

Polly Two : A New Algebraic Polynomial-based Public-Key Scheme. - Van-Ly Le (Appl. Algebra Eng. Commun. Comput., 2006)