^John Onians (2004). Atlas of World Art. Laurence King Publishing. p. 205p. ISBN1-85669-377-5. Government-sponsored kilns at punwon-ri, near Seoul, produced an exquisite and distinctive Joseon white porcelain for use at court and for export to China. Its undecorated cream-colored surfaces, and austere elegant shapes were thought to reflect a purity of mind and moral character appropriate for Neo-Confucian patrons.
^Law concerning Seoul metropolitan city, provinces, counties, districts and counties(1962. 11. 21.)
^Establishment of new cities including Hwasung.(2000. 12. 20.)