Tamaševičius, A., S. Bumelienė, R. Kirvaitis, G. Mykolaitis, E. Tamaševičiūtė, and E. Lindberg. “Autonomous DuffingHolmes Type Chaotic Oscillator”. Elektronika Ir Elektrotechnika, vol. 93, no. 5, May 2009, pp. 43-46, https://eejournal.ktu.lt/index.php/elt/article/view/10178.