Nguyen, T. S., N. H. Hoang, and M. A. Bin Hussein. “Setpoint Tracking-Error Control Design for Stabilization of Quadruple-Tank Process With Time Delay Using a Relaxing Port-Hamiltonian Formulation”. Journal of Technical Education Science, vol. 20, no. 04, Nov. 2025, pp. 97-107, doi:10.54644/jte.2025.2021.