Javier Lopez José A. Montenegro Rodrigo Roman Jorge Davila Design of a VPN Software Solution Integrating TCP and UDP Services. 325-338 2002 conf/infrasec/2002 InfraSec http://link.springer.de/link/service/series/0558/bibs/2437/24370325.htm db/conf/infrasec/infrasec2002.html#LopezMRD02