1. Robust stability of time-delay systems with an uncertain time-delay constant
2. The systems with delayed feedback;tsypkin,1946
3. Counting Characteristic Roots of Linear Delay Differential Equations. Part I: Frequency-sweeping Stability Tests and Applications;niculescu;Controlling Delayed Dynamics Advances in Theory Methods and Applications,2022
4. Delay effects on stability: a robust control approach;niculescu;Springer Science & Business Media,2001
5. Consensus under communication delays