• Fixed order stabilizing controller design via random reflection segmentsNurges, Ülo; Avanessov, SergeiThe 12th International Conference on Control, Automation, Robotics and Vision, ICARCV 2012 : 5-7 December, 2012, Guangzhou, China : [proceedings]2012 / p. 530-535 : ill https://ieeexplore.ieee.org/document/5983069/similar#similar
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