The Nobel Prize in Physics 1986
Ernst Ruska, Gerd Binnig, Heinrich Rohrer
The Nobel Prize in Physics 1986 was divided, one half awarded to Ernst Ruska "for his fundamental work in electron optics, and for the design of the first electron microscope", the other half jointly to Gerd Binnig and Heinrich Rohrer "for their design of the scanning tunneling microscope".
MLA style: "The Nobel Prize in Physics 1986". Nobelprize.org. 24 May 2013 http://www.nobelprize.org/nobel_prizes/physics/laureates/1986/index.html