Szöllósi, J., Tron, L., Damjanovich, S., Helliwell, S. H., Arndt-Jovin, D. J., & Jovin, T. M. (1984). Fluorescence energy transfer measurements on cell surfaces: A critical comparison of steady‐state fluorimetric and flow cytometric methods. Cytrometry, 5(2), 210-216. doi:10.1002/cyto.990050216.