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Wyrwas, Richard B.; Jarrold, Caroline Chick (2006). "Production of C6O6– from Oligomerization of CO on Molybdenum Anions". Journal of the American Chemical Society. 128 (42): 13688–13689. doi:10.1021/ja0643927. PMID17044687.
Schröder, Detlef; Schwarz, Helmut; Dua, Suresh; Blanksby, Stephen J.; Bowie, John H. (1999). "Mass spectrometric studies of the oxocarbons CnOn (n = 3–6)". International Journal of Mass Spectrometry. 188 (1–2): 17–25. Bibcode:1999IJMSp.188...17S. doi:10.1016/S1387-3806(98)14208-2. ISSN1387-3806.
Person, Willis B.; Williams, Dale G. (1957). "Infrared Spectra and the Structure of Leuconic Acid and Triquinoyl". The Journal of Physical Chemistry. 61 (7): 1017–1018. doi:10.1021/j150553a047. ISSN0022-3654.