Alberto Belussi Mauro Negri Giuseppe Pelagatti Modelling Spatial Whole-Part relationships using an ISO-TC211 conformant approach. 1095-1103 2006 48 Information & Software Technology 11 http://dx.doi.org/10.1016/j.infsof.2006.02.002 db/journals/infsof/infsof48.html#BelussiNP06