Rueckner, Wolfgang2016-06-292007Rueckner, Wolfgang. 2007. An improved demonstration of charge conservation. American Journal of Physics 75 (9): 861-863.0002-9505http://nrs.harvard.edu/urn-3:HUL.InstRepos:27413765en-USAn improved demonstration of charge conservationJournal Article2016-05-0620072016-06-2910.1119/1.2721589