Schweitzer, Dieter Department of Molecular Physics, Max Planck Institute for Medical Research, Max Planck Society;
https://www.tandfonline.com/doi/abs/10.1080/00268948508075183?needAccess=true#aHR0cHM6Ly93d3cudGFuZGZvbmxpbmUuY29tL2RvaS9wZGYvMTAuMTA4MC8wMDI2ODk0ODUwODA3NTE4Mz9uZWVkQWNjZXNzPXRydWVAQEAw (beliebiger Volltext)
https://doi.org/10.1080/00268948508075183 (beliebiger Volltext)
Koch, B., Geserich, H. P., Ruppel, W., Schweitzer, D., Dietz, K. H., & Keller, H. J. (1985). Optical investigations of the electrical anisotropy of α- and β- (BEDT-TTF)2I3. Molecular Crystals and Liquid Crystals, 119(1), 343-346. doi:10.1080/00268948508075183.