Sensorless Robust Observer-Based Immersion and Invariance Control With Input-to-State Practical Robustness for Disturbed Nonlinear Two-Tank Interacting Systems. - Ambe Harrison; Wulfran Fendzi Mbasso; Idriss Dagal; Hossam Kotb; Pradeep Jangir; Ali Elrashidi; Waleed Nureldeen; Mirjalol Ismoilov (IEEE Access, 2026)