Roberto Bagnara Katy Dobson Patricia M. Hill Matthew Mundell Enea Zaffanella Grids: A Domain for Analyzing the Distribution of Numerical Values. 219-235 2006 conf/lopstr/2006 LOPSTR http://dx.doi.org/10.1007/978-3-540-71410-1_16 db/conf/lopstr/lopstr2006.html#BagnaraDHMZ06