ChemInform Abstract: Structure of the Cyclobutane Radical CationBOUMA, W. J.; POPPINGER, D.; RADOM, L. · Chemischer Informationsdienst · 1983

Structure and [2+2] Cycloreversion of the Cyclobutane Radical CationWiest, Olaf · The Journal of Physical Chemistry A · 1999

The nature of the C…C ring-opened form of the ethylene oxide radical cationWillem J. Bouma; Dieter Poppinger; Svein Saebø; John K. Macleod; Leo Radom · 1984