A. Bichri, I. Kirrou, and M. Belhaq, “Energy Harvesting from Quasiperiodic Vibrations in a Delayed Rayleigh-Duffing Harvester Device”, JVTSD, vol. 4, no. 2, pp. 191–200, Aug. 2026, doi: 10.5890/JVTSD.2020.06.006.