Map Building of Unknown Environment Based on Fuzzy Sensor Fusion of Ultrasonic Ranging Data Publication Type: Conference Proceedings Authors: I-Hsum Lee; Ming Chih Lu; Chen-Chien Hsu; Shih-Shiun Lin Source: Advances in Autonomous Robotics. TAROS 2012. Lecture Notes in Computer Science, Springer, Volume 7429, Berlin, Heidelberg (2012)