Habib G, Rega G, Stépán G. Analytical investigation of single and double Neimark-Sacker bifurcations. Period. Polytech. Mech. Eng. [Internet]. 2012 Jan. 1 [cited 2024 Nov. 25];56(1):13-22. Available from: https://pp.bme.hu/me/article/view/1227