Richardson, OW (1913), "The Emission of Electrons From Tungsten at High Temperatures: An Experimental Proof That The Electric Current In Metals Is Carried By Electrons", Science (published 11 July 1913), 38 (967): 57–61, Bibcode:1913Sci....38...57Rdoi10.1126/science.38.967.57, PMID 17830216
Richardson, OW (1913), "The Emission of Electrons From Tungsten at High Temperatures: An Experimental Proof That The Electric Current In Metals Is Carried By Electrons", Science (published 11 July 1913), 38 (967): 57–61, Bibcode:1913Sci....38...57Rdoi10.1126/science.38.967.57, PMID 17830216
Richardson, OW (1913), "The Emission of Electrons From Tungsten at High Temperatures: An Experimental Proof That The Electric Current In Metals Is Carried By Electrons", Science (published 11 July 1913), 38 (967): 57–61, Bibcode:1913Sci....38...57Rdoi10.1126/science.38.967.57, PMID 17830216
Richardson, OW (1913), "The Emission of Electrons From Tungsten at High Temperatures: An Experimental Proof That The Electric Current In Metals Is Carried By Electrons", Science (published 11 July 1913), 38 (967): 57–61, Bibcode:1913Sci....38...57Rdoi10.1126/science.38.967.57, PMID 17830216