Agostino Forestiero Carlo Mastroianni Giandomenico Spezzano Spatial Sorting of Binary Metadata Documents via Nature-Inspired Agents in Grids. 63-72 2007 NICSO http://dx.doi.org/10.1007/978-3-540-78987-1_6 series/sci/2008-129 db/series/sci/sci129.html#ForestieroMS07