^"Openwork." Grove Art Online, Oxford Art Online. Oxford University Press, accessed May 26, 2015, subscription required (页面存档备份,存于互联网档案馆). Their article reads, in full: "Any form of decoration that is perforated". OED "Openwork", 1, where all examples cited from earlier than 1894 are hyphenated, though this is now less common than the single word.
^Diane Favro, et al. "Rome, ancient, s 5, ii." Grove Art Online. Oxford Art Online. Oxford University Press, accessed May 27, 2015, subscription required
^Timothy Taylor. "Scythian and Sarmatian art." Grove Art Online, Oxford Art Online. Oxford University Press, accessed May 27, 2015, subscription required
^Tokyo National Museum. 和英対照日本美術鑑賞の手引(An Aid to the Understanding of Japanese Art). 1976: 132/133. (revised edition; 1964 first ed.), p.132/133
^Whitfield, Roger (ed), Treasures from Korea: Art Through 5000 Years, p. 68, 1984, British Museum Publications, ISBN0-7141-1430-8, 9780714114309. Openwork bases and pedestals "became the characteristic and dominant forms in ceramics" in the Gaya confederacy period.