Media type: E-Article Title: The Proton Radius Problem Contributor: Bernauer, Jan C.; Pohl, Randolf imprint: Springer Science and Business Media LLC, 2014 Published in: Scientific American Language: Not determined DOI: 10.1038/scientificamerican0214-32 ISSN: 0036-8733 Keywords: Multidisciplinary Origination: Footnote: