Correlation Distribution of the Quaternary Kasami Sequences. - Tor Helleseth; P. Vijay Kumar; H. M. Martinsen; O. N. Vassbakk (SETA, 1998)

Binary Sequences of Period 2m-1 with Large Linear Complexity. - Tor Helleseth; H. M. Martinsen (Inf. Comput., 1999)