Haselbach, Edwin, Thomas Belly, Rudolf Gschwind, Urs Klemm, and Zuzana Lanyiova. “Electronic and Molecular Structure of Some Organic Radical Cations in Rigid Organic Systems”. CHIMIA 33, no. 11 (November 30, 1979): 405. Accessed April 15, 2025. https://www.chimia.ch/chimia/article/view/1979_405.