Günther Maier, Hans Peter Reisenauer, Ulrich Schäfer, and Heinz Balli (1988). "C5O2 (1,2,3,4-Pentatetraene-1,5-dione), a New Oxide of Carbon". Angewandte Chemie International Edition in English. 27 (4). doi:10.1002/anie.198805661. {{cite journal}}: Unknown parameter |paes= ignored (help)CS1 maint: multiple names: authors list (link)
