1. A. Fernandez-Gutierrez and A.Munoz de la Pena, in Molecular Luminescence Spectroscopy: Methods and Applications Part 1, ed. S. G. Schulman, Wiley, New York, 1985, p. 371;
2. Fluorescent Chemosensors for Ion and Molecular Recognition, ed. A. W. Czarnik, ACS Symp. Ser., 1993, vol. 528;
3. B. Valeur , Probe Design and Chemical Sensing. Topics in Fluorescence Spectroscopy, ed. J. R. Lackowicz, Plenum, New York, 1994, vol. 4, p. 21;
4. Molecular fluorescent signalling with ‘fluor–spacer–receptor’ systems: approaches to sensing and switching devices via supramolecular photophysics