1. P.G. Enright, Ensuring the Highest Quality and Reliability in Light Alloy Castings, vol. 6.1–6.18, Suttow Coldfield, UK, 28–29 October 1996.
2. P.G. Enright, Equipment Installation and Service Manual: Prifil Footprinter® Series 2—Aluminium Version, January 1997.