1. [1] Camus, A., 1942 Le Mythe de Sisyphe, in the 1965 Pléiade Edition (Gallimard) of the Essais, page 135; [The absurd] “is the divorce between the mind that desires and the world that disappoints”. Note, however, that for Camus, life itself is not absurd: “Il faut imaginer Sisyphe heureux”
2. [2] Krafft, M. P.; Riess, J. G. Angew. Chem. Int. Ed., 62 (2023), e202302942 (and references herein)
3. [3] Olah, G. A. Cage Hydrocarbons, Wiley, New York, 1990
4. [4] Eaton, P. E.; Cole, T. W. J. Am. Chem. Soc., 86 (1964), pp. 962-964
5. [5] Fort, R. C.; von Ragué Schleyer, P. Chem. Rev., 64 (1964), pp. 277-300