1. S. Sakanaka, et al., Status of ERL and cERL projects in Japan, in: Proceedings of Linac10 in Tsukuba Japan, September 12–17, 2010, TUP004.
2. K. Watanabe, et al., New HOM coupler design for ERL injector at KEK, in: Proceedings of 13th SRF Workshop, Peking University, Beijing, China, 2007.
3. K. Watanabe, et al., Status of development of the cERL superconducting injector Linac, in: Proceedings of Linac10 in Tsukuba Japan, September 12–17, 2010, TUP005.
4. New HOM coupler design for ILC superconducting cavity
5. K. Watanabe, et al., Cavity inspection and repair techniques, in: Proceedings of SRF2011 in Chicago, IL, USA, July 25–29, 2011, WEIOB02.