U. S.  Mote, Patil, S. R., Bhosale, S. H., Han, S. - H., and Kolekar, G. B., ?Fluorescence resonance energy transfer from tryptophan to folic acid in micellar media and deionised water?, Journal of Photochemistry and Photobiology B-Biology, vol. 103, no. 1, pp. 16-21, 2011.