Challenges in Modelling Analog PUFs: A Study of Hybrid and Diode Triode Current Mirror Inverter PUF Under Machine Learning Attacks. - Gisha Chittattukara Girijan; Ananda Sankar Chakraborty; Rajat Subhra Chakraborty; Bijoy Antony Jose; Jimson Mathew (IET Circuits Devices Syst., 2025)