Ravi Kaushik Yi Feng 0002 William Morris Jizhong Xiao Zhigang Zhu 3D map construction using heterogeneous robots. 1230-1235 2008 ICARCV http://dx.doi.org/10.1109/ICARCV.2008.4795697 conf/icarcv/2008 db/conf/icarcv/icarcv2008.html#KaushikFMXZ08