Two-photon laser spectroscopy of antiprotonic helium and the antiproton-to-electron mass ratio.Published in:Nature, 2011, v. 475, n. 7357, p. 484, doi. 10.1038/nature10260By:Hori, Masaki;Sótér, Anna;Barna, Daniel;Dax, Andreas;Hayano, Ryugo;Friedreich, Susanne;Juhász, Bertalan;Pask, Thomas;Widmann, Eberhard;Horváth, Dezs?;Venturelli, Luca;Zurlo, NicolaPublication type:Article