Che Razali, M., Abdul Wahab, N., Balaguer, P., Rahmat, M. F. A., & Samsudin, S. I. (2015). Singularly perturbation method applied to multivariable PID controller design. Hindawi Publishing Corporation.

Che Razali, Mashitah, Norhaliza Abdul Wahab, Pedro Balaguer, Mohd. Fua Ad Rahmat, and Sharatul Izah Samsudin. Singularly Perturbation Method Applied to Multivariable PID Controller Design. Hindawi Publishing Corporation, 2015.

Che Razali, Mashitah, et al. Singularly Perturbation Method Applied to Multivariable PID Controller Design. Hindawi Publishing Corporation, 2015.