Serdar Ekinci, Davut Izci, Mostafa Jabari, Mohit Bajaj, Vojtech Blazek, Lukáš Prokop. "Nonlinear 2-DOF PID controller optimized by artificial lemming algorithm for robust engine speed regulation in spark-ignition systems." Scientific Reports (2025). https://doi.org/10.1038/s41598-025-27873-2