Carlos M. de Lima Luiz M. G. Gonçalves Cristiana Bentes Ricardo C. Farias VisFluid: An Analysis Tool for Fluid Flow in Porous Media. 327-339 2005 conf/geoinfo/2005 GeoInfo http://www.geoinfo.info/geoinfo2005/papers/P34.PDF db/conf/geoinfo/geoinfo2005.html#LimaGBF05