Nishijima, D., Ye, M. Y., Ohno, N., & Takamura, S. (2003). Threshold of inicident ion energy for bubble formation on tungsten surface with low energy and high flux steady state helium plasma irradiation. Talk presented at 11. International Workshop on Fusion Reactor Materials (ICFRM-11). Kyoto. 2003-12-07 - 2003-12-12.