http://www.intel.com/technology/pciexpress/devnet/docs/WhatisPCIExpress.pdf

http://www.intel.com/technology/pciexpress/devnet/docs/PCI-Express-Overview-Oct2003.pdf

http://www.intel.com/technology/pciexpress/downloads/3rdgenwhitepaper.pdf

http://www.stanford.edu/class/ee183/handouts_win2003/VerilogQuickRef.pdf .

http://www.pcisig.com

http://www.auditmypc.com

http://www.riccibitti.com

http://www.doulos.com

http://www.pcstarts.com

http://www.d-silence.com/index.php

http://www.neoseeker.com

http://www.pcmcia.org

http://www.ece.umd.edu/courses/enee646.F2002/realize-verilog.pdf

http://www.sutherland-hdl.com/papers/1996-CUG-presentation_nonblocking_assigns.pdf .

http://uet.homeip.net/uet/Online/ADD/Verilog.pdf

http://www.epanorama.net/

http://www.xilinx.com