Pohl, Randolf Laser Spectroscopy, Max Planck Institute of Quantum Optics, Max Planck Society;
Bernauer, J. C., & Pohl, R. (2014). The Proton Radius Problem. Scientifican American, 310(2), 32-39. Retrieved from http://search.ebscohost.com/login.aspx?direct=true&db=buh&AN=93914558&site=ehost-live&scope=site.