(3YHbQjI GdJNda(B: (3GdJMOj hGdeUjQ OQGSI hGbYjI hJMdjdjI (B/ s - (3aGNhQj, LdGd s ((3YeGf (B: s (3OGQ jGaG GdYdejI ddfTQ hGdJhRjY, s, 2013)
Keywords: (3GdKhQGJ(B. s; (3GdHdOGf GdYQHjI(B. s; (3GdJZjQ GdELJeGYj(B. s; (3GdJGQjN(B. s