http://www.mincit.gov.co/loader.php?lServicio=Documentos&lFuncion=verPdf&id=82791&name=Resolucion_220_del_15_de_diciembre_de_2017__Preliminar_cables_y_torones_…pdf&prefijo=file (posljednji put posjećeno 2. veljače 2018.).
Young Heung Iron & Steel Co., Ltd, 71–1 Sin-Chon Dong, Changwon City, Gyungnam