Pavel Klinov Lawrence J. Mazlack Granulating semantic web ontologies. 431-434 2006 GrC http://ieeexplore.ieee.org/xpls/abs_all.jsp?isnumber=34297&arnumber=1635833&count=189&index=97 conf/grc/2006 db/conf/grc/grc2006.html#KlinovM06