Woo, Kyung; Sohn, Young; Ahn, Ung; Spate, Andy (January 2013), "Geology of Jeju Island", Jeju Island Geopark - A Volcanic Wonder of Korea, Geoparks of the World (closed), vol. 1, pp. 13–14, doi:10.1007/978-3-642-20564-4_5, ISBN978-3-642-20563-7
Landsat/Copernicus; Data SIO; NOAA; United States Navy; NGA; GEBCO; TMap Mobility; TerraMetrics (2022). "Korea Strait" (Map). Google Earth. Alphabet. Retrieved 15 May 2022.