Xianming Ye B. Choi Kang, Sung Chul H. Choi 2024-01-13T06:01:13Z 2024-01-13T06:01:13Z 2021-09-29 https://pubs.kist.re.kr/handle/201004/103308 English Pen-Type Sensor for Surface Roughness Perception Conference 1 IROS2007 IROS2007 US