Hutchings, Michael G., Simon Allen, D. John Bone, Andrew N. Burgess, Neil Carter, David P. Devonald, Archie Eaglesham, et al. “Application of Dyes in Nonlinear Optical Materials”. CHIMIA 45, no. 10 (October 30, 1991): 285. Accessed May 3, 2024. https://www.chimia.ch/chimia/article/view/1991_285.