Zi-Jiang Yang Youichirou Fukushima Pan Qin Decentralized Adaptive Robust Control of Robot Manipulators Using Disturbance Observers. 1357-1365 2012 20 IEEE Trans. Control. Syst. Technol. 5 https://doi.org/10.1109/TCST.2011.2164076 https://www.wikidata.org/entity/Q56408927 db/journals/tcst/tcst20.html#YangFQ12