Kostas Gavroglu, ‘Strutt, John William, third Baron Rayleigh (1842–1919)’, Oxford Dictionary of National Biography, Oxford University Press, 2004 [http://www.oxforddnb.com/view/article/36359] John William Strutt (1842–1919): doi:10.1093/ref:odnb/36359; Nobel Prize : biographies of winners (http://www.nobelprize.org/physics/laureates/1904/strutt-bio.html)