Mitsopoulos, Antonios, and Michael Tsamparlis. “Higher Order First Integrals of Autonomous Dynamical Systems in Terms of Geometric Symmetries”. Journal of Vibration Testing and System Dynamics, vol. 7, no. 1, Aug. 2026, pp. 23-30, https://doi.org/10.5890/JVTSD.2023.03.004.