Basturk, H. I. “Active Unmatched Disturbance Cancellation and Estimation by State--Derivative Feedback for Plants Modeled As an LTI System”. An International Journal of Optimization and Control: Theories & Applications (IJOCTA), vol. 8, no. 2, July 2018, pp. 237-49, doi:10.11121/ijocta.01.2018.00519.