“MPROVEMENT OF ACTIVE DISTURBANCE REJECTION CONTROL PERFORMANCE INTHE TARGET-INDICATING GIMBAL SYSTEM USING THE M-TH ORDEREXTENDED STATE OBSERVER WITH FREQUENCY ESTIMATION”, Kashf J. Multidiscip. Res., vol. 3, no. 10, pp. 14–34, Oct. 2026, doi: 10.71146/kjmr1029.