HUTCHESON, James Olan. The End of a 1,400-Year-Old Business [online]. BusinessWeek, 2007-04-16 [cit. 2008-03-21]. Dostupné online. (anglicky)
web.archive.org
End of the Road for World’s Oldest Firm [online]. Digital Chosunilbo, 2005-12-15 [cit. 2008-03-21]. Dostupné v archivu pořízeném dne 2008-09-19. (anglicky)