^Mitchison, N. A. (2000). "James Griffiths Howard. 25 September 1927 -- 6 October 1998: Elected F.R.S. 1984". Biographical Memoirs of Fellows of the Royal Society. 46: 257. doi:10.1098/rsbm.1999.0083. S2CID58394796.
^Rees, S. M. (2008). "William Parry. 3 July 1934 -- 20 August 2006". Biographical Memoirs of Fellows of the Royal Society. 54: 229–243. doi:10.1098/rsbm.2007.0035. S2CID73955582.