http://plcvietnam.com.vn/showthread.php?t=137
http://plcvietnam.com.vn/showthread.php?t=255
http://plcvietnam.com.vn/showthread.php?t=138
http://plcvietnam.com.vn/showthread.php?t=204
bạn coi ở các mục đó nha.