http://dx.doi.org/10.1007/3-540-48482-5_23 Thomas Brinkhoff Requirements of Traffic Telematics to Spatial Databases. 365-369 SSD/1999/16510365.pdf 1999 conf/ssd/99 SSD http://link.springer.de/link/service/series/0558/bibs/1651/16510365.htm db/conf/ssd/ssd99.html#Brinkhoff99