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2. URL: http: // www.rls.ru.@
3. Methods for the Analysis of Minor Biologically Active Food Substances IR V. A. Tutel’yan and K. I. Éller (eds.), Dinastiya, Moscow (2010).
4. State Standard GOST R 53773–2010, Juice Products. Methods for Assay of Anthocyanins [in Russian].
5. State Standard GOST 31643–2012, Juice Products. Assay of Ascorbic Acid by High performance Liquid Chromatography [in Russian].