Lâm, Nguyễn Văn, et al. “Aperiodical Corelation Function and Complexity (Equivalen Linear Sapan) of the Nonlinear PN-Sequences for 3. Generator CDMA”. <i>Journal of Computer Science and Cybernetics</i>, vol. 22, no. 1, July 2012, pp. 75-80, doi:10.15625/1813-9663/22/1/1395.