RANJBAR, S. . Study of export to external barriers of small and medium enterprises (Case Study of Kurdistan Province). Scientific Journal of Pure and Applied Sciences, [S. l.], v. 3, n. 10, p. 865-869, 2014. Disponível em: http://www.sjournals.com/index.php/sjpas/article/view/467. Acesso em: 21 jan. 2022.