ML-Sequences over Rings Z/(2e)*: I. Constructions of Nondegenerative ML-Sequences II. Injectiveness of Compression Mappings of New Classes. - Wen Feng Qi; Jun-Hui Yang; Jing Jun Zhou (ASIACRYPT, 1998)

Compression mappings on primitive sequences over Z/(pe). - Xuan Yong Zhu; Wen Feng Qi (IEEE Trans. Inf. Theory, 2004)

Further Result of Compressing Maps on Primitive Sequences Modulo Odd Prime Powers. - Xuan Yong Zhu; Wen Feng Qi (IEEE Trans. Inf. Theory, 2007)