D. T. Tran, N. M. Hoang, N. H. Loc, Q. T. Truong, and N. T. Nha, “A Fuzzy LQR PID Control for a Two-Legged Wheel Robot with Uncertainties and Variant Height”, J Robot Control (JRC), vol. 4, no. 5, pp. 612–620, Sep. 2023.