TY - CONF T1 - Mobile Robot Path Planning and Navigation Using Hierarchical Graphs A1 - Fernández-Madrigal, Juan-Antonio A1 - Gonzalez-Jimenez, Javier TI - International ICSC Symposium on Engineering of Intelligent Systems (EIS'98) Y1 - 1998 CY - Tenerife, Canary Islands (Spain) ER -