http://www.aip.org/history/electron/jjhome.htm
http://www.hiru.com/es/fisika/fisika_05600.html
http://www.educared.net/concurso/764/particulas2.htm
http://soko.com.ar/Fisica/cuantica/Atomo.htm
http://www.aip.org/history/electron/jj1897.htm
http://www.chemheritage.org/classroom/chemach/atomic/thomson.html