* http://www.olivertwins.com/ - according to this webpage, the Oliver Twins created "The CD Games Pack" in December 1989, for Amstrad CPC, Spectrum, and Commodore 64, published by Codemasters
* http://www.speccy.org/trastero/cosas/JL/JL.htm - A Spectrum Hardware webpage. * http://www.speccy.org/trastero/cosas/JL/CableCD/CableCD.html Testing the wire of the CD Games Pack.
Whether or not the Amstrad CPC version was actually released is a bit unclear. Did anybody ever see it for real?