"Additives Help Improve Compression Set"
Kenneth O. McElrath and Matthew B. Measmer
Rubber and Plastics News, January 29, 1996

"Dynamic Properties of Elastomer Blends"
Kenneth O. McElrath, Matthew B. Measmer and S. Yamashita

"A Review of Isobutylene-Based Elastomers used in Automotive Applications"
J.E. Rogers and W.H. Waddell