6[3]Andrew S.Dye.Shih-Lung Shaw.2006.A GIS-based spatial decision support system for tourists of Great Smoky Mountains National Park[J].Journal of Retailing and Consumer Services(2006).doi:10.1016/j.jretconser.
7[4]Malczewski J.1997.Spatial decision support systems[J].The NCGIA Core Curriculum in GIScience,Unit127 http://www.ncgia.ucsb.edu/giscc/units/u127/.