Kulbayeva, Z., L. Kudreeva, Z. Supieva, and B. Serikbayev. “Electrochemical Behaviour of Perrhenate-Ions on Shungite Electrode in Acidic Electrolyte”. Chemical Bulletin of Kazakh National University, Vol. 67, no. 3, Sept. 2012, pp. 135-8, doi:https://doi.org/10.15328/chemb_2012_3135-138.