Subekti, A., S. Sugihartono, N. R. Syambas, and A. B. Suksmono. “A HOS-Based Blind Spectrum Sensing in Noise Uncertainty”. Journal of ICT Research and Applications, vol. 9, no. 1, June 2015, pp. 20-38, doi:10.5614/itbj.ict.res.appl.2015.9.1.2.