1. L. Merminga, Status of FNAL and the PIP-II project, in: Presentation in 3rd J-PARC Symposium 2019, Tsukuba, Japan.
2. PIP-II final design report,2021
3. Superiority of electropolishing over chemical polishing on high gradients;Saito,1998
4. First experimental results for the superconducting half-wave resonators for PXIE;Conway,2014
5. High-field Q slope in superconducting cavities due to magnetic field enhancement at grain boundaries;Knobloch,1999