Reference Label	Details
Hall 1973	H. K. Hall Jr., C. D. Smith, and J. H. Baldt, J. Am. Chem. Soc. 95, 3197-3201 (1973) Enthalpies of Formation of Nortricyclene, Norbornene, Norbornadiene, and Quadricyclane
as quoted by Cox 1970	as quoted by Cox 1970