Hongyinping Feng Bao-Zhu Guo Xiao-hui Wu Trajectory Planning Approach to Output Tracking for a 1-D Wave Equation. 1841-1854 2020 65 IEEE Trans. Autom. Control. 5 https://doi.org/10.1109/TAC.2019.2937727 db/journals/tac/tac65.html#FengGW20