Reference Label	Details
Bieri 1977a	G. Bieri, E. Heilbronner, J.-P. Stadelmann, J. Vogt, and W. von Niessen, J. Am. Chem. Soc. 99, 6832-6838 (1977) Electronic States of Difluoroacetylene, Difluorodiacetylene, and Perfluoropentadiyne-1,3 Radical Cations. A Photoelectron Spectroscopic Investigation