diff --git a/car_fmw/src/lib/usb_vcp/README.txt b/car_fmw/src/lib/usb_vcp/README.txt
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+This library is cleaned up and minfied version
+of code represented at
+http://vedder.se/2012/07/usb-serial-on-stm32f4/
+
+Useful resources:
+http://www.beyondlogic.org/usbnutshell/usb1.shtml
+http://www.usbmadesimple.co.uk/index.html
+http://www.linusakesson.net/programming/tty/