Bryce, M., Batsanov, A., Finn, T., & Hansen, T. (2000). Crown-annelated 9,10-bis(1,3-dithiol-2-ylidene)-9,10-dihydroanthracene derivatives: a new efficient transducer in the electrochemical and spectroscopic monitoring of metal complexation. Chemical Communications, 295-296. https://doi.org/10.1039/a908716h