(1) Polymer additive migration to foods - a direct comparison of experimental data and values calculated from migration models for high density polyethylene (HDPE), Anthony O'Brien; Anne Goodson; Ian Cooper, Food Additives & Contaminants: Part A, Volume 16, Issue 9 January 1999 , pages 367 - 380 http://www.informaworld.com/smpp/content~content=a713810561?words=modelling|additive|diffusion&hash=1369803257
(2) Polymer additive migration to foods-a direct comparison of experimental data and values calculated from migration models for polypropylene Authors: Anthony O'Brien a; Ian Cooper a Published in: Food Additives & Contaminants: Part A, Volume 18, Issue 4 April 2001 , pages 343 – 355 http://www.informaworld.com/smpp/content~content=a713810829?words=modelling|additive|diffusion&hash=1369803257