Rujukan WikiPedia: Ernst_Ruska http://ernst.ruska.de/daten_e/mainframe_e.html http://adsabs.harvard.edu/abs/1990PhT....43g..84H http://socialarchive.iath.virginia.edu/ark:/99166/... http://data.bibliotheken.nl/id/thes/p068599315 //doi.org/10.1063%2F1.2810640 http://isni.org/isni/0000000116262118 http://nobelprize.org/nobel_prizes/physics/laureat... http://nobelprize.org/physics/laureates/1986/ruska... http://www.physicstoday.org/resource/1/phtoad/v43/... https://id.loc.gov/authorities/names/n81056954
