1. All-Union State Standard 8.504-84: Specifications for the Structure, Content, and Exposition in Documents Dealing with Methods of Making Measurements on the Component Contents in Samples, Substances, and Materials [in Russian].
2. All-Union State Standard 8.207-76: Direct Measurements with Repeated Observations: Methods of Processing the Observational Results [in Russian].
3. J. E. Cuddeback et al., Anal. Chem.,47, 355 (1975).
4. A. A. Benedetti-Pichler, Introduction to the Microtechnique of Inorganic Analysis, John Wiley, N.Y. (1942).
5. P. Kirk, Quantitative Ultramicroanalysis, Krieger, New York (1950).