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Douberly, G.E.; Ricks, A.M.; Ticknor, B.W.; McKee, W.C.; Schleyer, P.v.R.; Duncan, M.A., Infrared Photodissociation Spectroscopy of Protonated Acetylene and Its Clusters, J. Phys. Chem. A, 2008, 112, 9, 1897, https://doi.org/10.1021/jp710808e . [all data]