Sanjaya, M., D. Maulana, M. Mamat, and Z. Salleh. “Nonlinear Dynamics of Chaotic Attractor of Chua Circuit and Its Application for Secure Communication”. Jurnal Otomasi Kontrol Dan Instrumentasi, vol. 3, no. 1, Apr. 2011, p. 1, doi:10.5614/joki.2011.3.1.1.