American Chemical Society. "Isobutylene." Molecule of the Week, 19 Dec. 2022, https://www.acs.org/molecule-of-the-week/archive/i/isobutylene.html. Accessed 2 May 2025.
American Chemical Society. "Isooctane." Molecule of the Week, https://www.acs.org/molecule-of-the-week/archive/i/isooctane.html. Accessed 2 May 2025.
"Butylhydroxyanisole." PubChem, https://pubchem.ncbi.nlm.nih.gov/compound/Butylhydroxyanisole. Accessed 2 May 2025.
"butyl rubber." Britannica School, Encyclopædia Britannica, 20 Mar. 2023. libraries.state.ma.us/login?eburl=https%3A%2F%2Fschool.eb.com&ebtarget=%2Flevels%2Fhigh%2Farticle%2Fbutyl-rubber%2F95452&ebboatid=9264953. Accessed 6 Apr. 2025.
ChemBroad. "Butyl Rubber Synthesis: A Comprehensive Overview." ChemBroad, https://www.chembroad.com/butyl-rubber-synthesis-a-comprehensive-overview/. Accessed 2 May 2025.
Hall, Susan Bard. "Football." How Products Are Made. Vol. 3 : an Illustrated Guide to Product Manufacturing, by Kristine M. Krapp and Jacqueline L. Longe, Gale, 1998, pp. 159-61.
Industrial Chemicals Australia. EVA00029 Evaluation Statement – 14 January 2022. https://www.industrialchemicals.gov.au/sites/default/files/2022-01/EVA00029%20-%20Evaluation%20statement%20-%2014%20January%202022%20%5B2006%20KB%5D.pdf. Accessed 2 May 2025.
National Center for Biotechnology Information. "PubChem Compound Summary for CID 8255, Isobutylene" PubChem, https://pubchem.ncbi.nlm.nih.gov/compound/Isobutylene. Accessed 6 April, 2025.
National Inventors Hall of Fame. "Robert M. Thomas." Inventors Hall of Fame, https://www.invent.org/inductees/robert-m-thomas. Accessed 2 May 2025.
O'Malley, James. Personal interview with the author. 31 Mar. 2025.
"WO2010046925A2." Google Patents, https://patents.google.com/patent/WO2010046925A2/en. Accessed 2 May 2025.