Honghai Liu David J. Brown George Macleod Coghill Geometrical Representation of Quantity Space and Its Application to Robot Motion Description. 18-25 2007 conf/kes/2007-2 KES (2) http://dx.doi.org/10.1007/978-3-540-74827-4_3 db/conf/kes/kes2007-2.html#LiuBC07