Aghaie, M., Fekri, M. H., Giahi, M., Baghdar, E., Farhadi, S. (2007) ‘Cu(II) Ion- Selective Membrane Electrode Based on bis(N-salicylidene-3,3'-diamino diphenyl) sulfone’, Journal of Physical & Theoretical Chemistry, 4(1), pp. 57-62. doi: