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The manuscript should be prepared using LaTeX or PDF or Ms-Word processing system, basic font Roman 12pt size. The papers should be in English and typed in frames 14 x 20 cm (margins 3 cm on left and right and 4 cm on top and bottom) in single column on A4-format white paper with 1.5 line spacing. On the first page leave 4 cm space on the top for the journal's headings.