VPass: Algorithmic compass using vanishing points in indoor environments. - Young Hoon Lee; Changjoo Nam; Keon Yong Lee; Yuen Shang Li; Soo Yong Yeon; Nakju Lett Doh (IROS, 2009)

Humanoid Path Planning From HRI Perspective: A Scalable Approach via Waypoints With a Time Index. - Soo-Hyun Ryu; Yeonsik Kang; Sin-Jung Kim; Keon Yong Lee; Bum-Jae You; Nakju Lett Doh (IEEE Trans. Cybern., 2013)

Analysis of the reference coordinate system used in the EKF-based SLAM. - Keon Yong Lee; Soo-Hyun Ryu; Jaehyeon Kang; Hyunga Choi; ChangHyun Jun; Nakju Lett Doh (URAI, 2014)

Accurate Continuous Sweeping Framework in Indoor Spaces With Backpack Sensor System for Applications to 3-D Mapping. - Keon Yong Lee; Soo-Hyun Ryu; Suyong Yeon; HyunGi Cho; ChangHyun Jun; Jaehyeon Kang; Hyunga Choi; Janghun Hyeon; Insik Baek; Woonhyung Jung; Han-Ul Kim; Nakju Lett Doh (IEEE Robotics Autom. Lett., 2016)

A practical 2D/3D SLAM using directional patterns of an indoor structure. - Keon Yong Lee; Soo-Hyun Ryu; Changjoo Nam; Nakju Lett Doh (Intell. Serv. Robotics, 2018)