Vogler, Helmut Department of Organic Chemistry, Max Planck Institute for Medical Research, Max Planck Society;
https://www.degruyter.com/downloadpdf/j/zna.1981.36.issue-6/zna-1981-0620/zna-1981-0620.xml (Any fulltext)
https://doi.org/10.1515/zna-1981-0620 (Any fulltext)
Bräuchle, C., Voitländer, J., & Vogler, H. (1981). Correlations between the ground state and the triplet state character orders of benzenoid hydrocarbons. Zeitschrift für Naturforschung, A: Physical Sciences, 36(6), 651-653. doi:10.1515/zna-1981-0620.