Kaplan Daniel M., Kirch Klaus, Mancini Derrick, Phillips James D., Phillips ThomasJ., Roberts Thomas J., Terry Jeff 2015, 'Measuring antimatter gravity with muonium', EPJ Web of Conferenceshttp://dx.doi.org/10.1051/epjconf/20159505008. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)

Mark J. Silver, Lee D. Peterson, Lisa M.R. Hardaway 2007, 'Experimental Measurement of Picometer Scale Spontaneous Vibrations in a PrecisionDeployable Boom under Thermal Loading', Shock and Vibrationhttp://dx.doi.org/10.1155/2007/393578. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)