1. Agatsuma Y and Sugawara Y(1988). Reproductive cycle and food ingestion of the sea urchin, Strongylocentrotus nudus(A. Agassiz), in southern Hokkaido. Ⅱ. Seasonal changes of the Gut content and test weight. Sci. Rep. Hokkaido Fish. Exp. Stn. 30, 43~49.
2. Agatsuma Y, Motoya S and Sugawara Y(1988). Reproductive cycle and food ingestion of the sea urchin, Strongylocentrotus nudus(A. Agassiz), in southern Hokkaido. Ⅰ. Seasonal changes of the gonad. Sci. Rep. Hokkaido Fish. Exp. Stn. 30, 33~41.
3. Community Structure of Subtitdal Marine Algae at Uljin on theEast Coast of Korea
4. Feldmann J(1937). Recherches sur la vegetation marine de la Mediterranee. Rev. Alg. 10, 1-340.
5. Fuji A(1960a). Studies on the Biology of the Sea Urchine Ⅰ. Superficial and Histological Gonadal Changes in Gametogenic process of Two Sea Urchins, Strongylocentrotus nudus and S. intermedius. Bull. Fac. Fish. Hokkaido Univ. 11(1), 1~14.