1. R.A. Durst, (Editor). ‘Ion Selective Electrodes,” N.B.S. Spec. Publ. No.314, Washington D.C. (1969).
2. ‘Selective Ion Sensitive Electrodes”;Moody,1971
3. ‘Das Arbeiten mit Ionen Selektione Elektroden”;Camman,1973
4. ‘Determination of pH: Theory and Practice”;Bates,1973