An In-Depth Analysis of Ring Oscillators: Exploiting Their Configurable Duty-Cycle. - Javier Agustin; Marisa López-Vallejo (IEEE Trans. Circuits Syst. I Regul. Pap., 2015)

A temperature-independent PUF with a configurable duty cycle of CMOS ring oscillators. - Javier Agustin; Marisa Luisa López-Vallejo (ISCAS, 2016)