(en) A. Antognini, F. Nez, K. Schuhmann et F. D. Amaro, « Proton Structure from the Measurement of 2S-2P Transition Frequencies of Muonic Hydrogen », Science, vol. 339, no 6118, , p. 417–420 (PMID23349284, DOI10.1126/science.1230016, Bibcode2013Sci...339..417A)
(en) Randolf Pohlet al., « Laser spectroscopy of muonic deuterium », Science, vol. 353, no 6300, , p. 669-673 (DOI10.1126/science.aaf2468)
(en) A. Antognini, F. Nez, K. Schuhmann et F. D. Amaro, « Proton Structure from the Measurement of 2S-2P Transition Frequencies of Muonic Hydrogen », Science, vol. 339, no 6118, , p. 417–420 (PMID23349284, DOI10.1126/science.1230016, Bibcode2013Sci...339..417A)
nih.gov
ncbi.nlm.nih.gov
(en) A. Antognini, F. Nez, K. Schuhmann et F. D. Amaro, « Proton Structure from the Measurement of 2S-2P Transition Frequencies of Muonic Hydrogen », Science, vol. 339, no 6118, , p. 417–420 (PMID23349284, DOI10.1126/science.1230016, Bibcode2013Sci...339..417A)
pourlascience.fr
Jan Bermauer et Randolph Pohl, « Le proton, un problème de taille », Pour la science, vol. 439, (lire en ligne)
See, e.g., J. Byrne, "The mean square charge radius of the neutron", Neutron News Vol. 5, Issue 4, pg. 15-17 (1994) (comparing different theoretical explanations for the neutron's observed negative squared charge radius to the data) DOI:10.1080/10448639408217664 http://www.tandfonline.com/doi/abs/10.1080/10448639408217664#.