http://www.linuxjournal.com/article/6331 http://www.linux.it/~rubini/docs/serial/serial.html

http://www.ok-labs.com/_assets/download_library/OK_Virtualization_WP.pdf

http://l4ka.org/publications/2006/soft-layer.pdf

http://l4ka.org/publications/2005/previrtualization-techreport.pdf