Project Materials Project Materials Preceding Works Journal Articles Talks Theses Posters Project MaterialsE. Widmann et al.Measurement of the antihydrogen hyperfine structure, Letter of Intent, CERN-SPSC-2003-009, (2003)pdfASACUSA Collaboration, Proposal CERN-SPSC 2005-002 – P307 Add. 1 (2005)pdf