db/conf/gis/Scarponcini99.html Paul Scarponcini Generalized Model for Linear Referencing. 53-59 GIS1999/P053.pdf 1999 conf/gis/99 ACM-GIS http://doi.acm.org/10.1145/320134.320149 db/conf/gis/gis99.html#Scarponcini99