Jose-Norberto Mazón Jens Lechtenbörger Juan Trujillo Solving summarizability problems in fact-dimension relationships for multidimensional models. 57-64 2008 DOLAP http://doi.acm.org/10.1145/1458432.1458443 conf/dolap/2008 db/conf/dolap/dolap2008.html#MazonLT08