Henderson, J.; McLoughlin, S. D.; McPhail, D. S. (2004). "Radical changes in Islamic glass technology: evidence for conservatism and experimentation with new glass recipes from early and middle Islamic Raqqa, Syria". Archaeometry. 46 (3): 439–68. doi:10.1111/j.1475-4754.2004.00167.x.
The Metropolitan Museum of Art [1] "Although the roots of Sueki reach back to ancient China, its direct precursor is the grayware of the Three Kingdoms period in Korea."
