2[3]Jens Vejlby Thomsen, Asger Knudsen, Web-Based Management of Large Bridges Maintenance and Tunnels. PIARC XXIst World Road Congress. Kuala Lumpur, Malasia, 1999.
3[4]American Association of State Highway and Transportation Officials. Guidelines For Bridge Management Systems, 1993.
4[2]PDA-Based Field Data Collection For Pontis.International Bridge Conference,Pittsburgh,1995.
5[3]Automated Methods for Collecting Bridge Inspection Data in the Pontis Format.ASHTOWARE Pontis Bridge Management Sys tem,2002.