Vogler, Helmut Department of Organic Chemistry, Max Planck Institute for Medical Research, Max Planck Society;
https://www.sciencedirect.com/science/article/pii/S0040402001967948/pdf?md5=69d1c3db1f9b30656f30a4433fb84bef&pid=1-s2.0-S0040402001967948-main.pdf (Any fulltext)
https://doi.org/10.1016/S0040-4020(01)96794-8 (Any fulltext)
Vogler, H. (1985). Ring current effects in [4m+2]annulenes and their di- and tetraanions. Tetrahedron, 41(22), 5383-5386. doi:10.1016/S0040-4020(01)96794-8.