1. Paper Mate's new erasable ink pen;Flynn;Journal of Police Science and Administration,1979
2. Eraser Mate Un stylo a bille a encre effacable;Pfefferli;Revue de Internationale de Criminologie et de Police Technique,1979
3. Erasable ink ballpoint pens;Tiffes;International Criminal Police Review,1980
4. The influence of easy correction devices on the security of documents;Hilton,1981
5. Erasable ink again;Buquet;International Criminal Police Review,1982