hoang, H.D.L. 2025. Adaptive observer-based sliding mode control with time-varying learning using Riccati gain synthesis for robotic manipulators. Journal of Military Science and Technology. 107, 107 (Nov. 2025), 13–23. DOI:https://doi.org/10.54939/1859-1043.j.mst.107.2025.13-23.