e.g. Filippa Pettersson or Cancer Res. 75(6) , 1102-12, (2015) or 10.1002/anie.201600521
The Journal of Physical Chemistry B
A new family of π-conjugated delocalized biradicals: Electronic structures of 1, 4-bis (2, 5-diphenylimidazol-4-ylidene) cyclohexa-2, 5-diene
A Kikuchi, H Ito, J Abe
Index: Sakaino, Yoshiko Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1983 , # 5 p. 1063 - 1066