Gulakov, M. N., Petrov, N. K., Alfimov, M. V., & Techert, S. (2004). An absorption-fluorescence method for estimation of the efficiency of nonradiative relaxation of cyanine dyes. High Energy Chemistry, 38(6), 381-385. Retrieved from http://springerlink.metapress.com/content/q04k41h8l7170508/fulltext.pdf.