Characterization of m-Sequences of Lengths $2^{2k}-1$ and $2^k-1$ with Three-Valued Crosscorrelation

Tor Helleseth Alexander Kholosha Geir Jarle Ness Characterization of m-Sequences of Lengths $2^{2k}-1$ and $2^k-1$ with Three-Valued Crosscorrelation http://arxiv.org/abs/cs/0702139 2007 CoRR abs/cs/0702139 db/journals/corr/corr0702.html#abs-cs-0702139 informal publication