@article {ahmadi2018characterization, title = {Characterization of the 1S{\textendash}2S transition in antihydrogen}, journal = {Nature}, volume = {557}, number = {7703}, year = {2018}, pages = {71}, publisher = {Nature Publishing Group}, author = {Ahmadi, M and Alves, BXR and Baker, CJ and Bertsche, W and Capra, A and Carruth, C and Cesar, CL and Charlton, M and Cohen, S and Collister, R and others} }