1. 1) The number of papers on aryne chemistry was counted using Web of Science Core Collection (Thomson Reuters) on July 28, 2018, [topic: “*benzyne* OR *aryne* OR *pyridyne* OR *naphthalyne* OR *quinolyne* OR *indolyne*”; publication type: article, note, letter; category: chemistry]
2. 2) (a) Dehydrobenzene and Cycloalkynes, ed. by R. W. Hoffmann, Academic Press, New York, (1967)
3. (b) I. Tabushi, H. Yamada, J. Synth. Org. Chem., Jpn., 28, 667 (1970)
4. (c) H. Yoshida, Nucleophilic Coupling with Arynes, in Comprehensive Organic Synthesis (Second Edition), ed. by P. Knochel, G. A. Molander, Elsevier, Amsterdam, vol. 4, pp 517-579 (2014)
5. (d) H. Yoshida, Aryne-Based Multicomponent Reactions, in Multicomponent Reactions in Organic Synthesis, eds. by J. Zhu, Q. Wang, M.-X. Wang, Wiley-VCH, Weinheim, pp 39-71 (2015)