[1] Sen, B. (1957) Indirect complexometric titration of sodium and potassium with EDTA. Fresenius’ Zeitschrift für Analytische Chemie, 157, 2-6.
[2] Dobbins, J.T. and Byrd, R.M. (1931) A volumetric method of determining sodium. Journal of the American Chemical Society, 53, 3288-3291 http://dx.doi.org/10.1021/ja01360a011
[3] Carr, J.D. and Swartzfager, D.G. (1970) Complexometric titration for the determination of sodium ion. Analytical Chemistry, 42, 1238-1241. http://dx.doi.org/10.1021/ac60293a025