Obituaries: "Mr Peter Boardman and Mr Joe Tasker: contribution to mountaineering and its literature" The Times 7 June 1982, p16; "In Memoriam"Alpine Journal 1983, pp262-269; Chris Bonington "Tribute to Peter Boardman and Joe Tasker" Climber and Rambler August 1982, p23; Chris Bonington "Pete and Joe" Mountain No. 88, p36; Dr Charles Clarke "Peter Boardman"Archived 27 May 2013 at the Wayback Machine; Dennis Gray "Peter" Climber and Rambler August 1982, pp46-47; Walt Unsworth "Peter David Boardman (1950–1982) Climber and Rambler August 1982, p22; Martin Wragg "Peter Boardman" High No. 5 October/November 1982, p14-15.
Obituaries: "Mr Peter Boardman and Mr Joe Tasker: contribution to mountaineering and its literature" The Times 7 June 1982, p16; "In Memoriam"Alpine Journal 1983, pp262-269; Chris Bonington "Tribute to Peter Boardman and Joe Tasker" Climber and Rambler August 1982, p23; Chris Bonington "Pete and Joe" Mountain No. 88, p36; Dr Charles Clarke "Peter Boardman"Archived 27 May 2013 at the Wayback Machine; Dennis Gray "Peter" Climber and Rambler August 1982, pp46-47; Walt Unsworth "Peter David Boardman (1950–1982) Climber and Rambler August 1982, p22; Martin Wragg "Peter Boardman" High No. 5 October/November 1982, p14-15.
History and description of ridge taken from Everest: The Unclimbed Ridge. See also photo of upper part of North East Ridge at Summitpost.org; and maps of Everest at Codex99.com.
larsonweb.com
Salkeld, Audrey (1983) "Peter Boardman"Karrimor Technical Guide to Products, p17.
oxforddnb.com
Bermúdez, José Luis. "Boardman, Peter David (1950–1982)". first published 2004; online edn, May 2006, 1311 words, with portrait illustration. Oxford Dictionary of National Biography. Retrieved 26 September 2012.
peaklist.org
This is the height used in accounts by expedition members. Other authorities give the elevation as 7,649m. See, for instance Peaklist.org. Retrieved 24 September 2012.
Bonington, Chris (1982) "Kongur, Sinkiang", American Alpine Journal 1982. pp288-293.
Bonington, Chris and Clarke, Charles (1983) Everest, the Unclimbed Ridge London: Hodder and Stoughton. See also Chris Bonington, "Everest's Northeast Ridge", American Alpine Journal 1983. pp22-29.
Ohmiya, Motomo and Khrishchaty, Valeri (1993) "Everest's Northeast Ridge", American Alpine Journal 1993. pp15-18.
History and description of ridge taken from Everest: The Unclimbed Ridge. See also photo of upper part of North East Ridge at Summitpost.org; and maps of Everest at Codex99.com.
Obituaries: "Mr Peter Boardman and Mr Joe Tasker: contribution to mountaineering and its literature" The Times 7 June 1982, p16; "In Memoriam"Alpine Journal 1983, pp262-269; Chris Bonington "Tribute to Peter Boardman and Joe Tasker" Climber and Rambler August 1982, p23; Chris Bonington "Pete and Joe" Mountain No. 88, p36; Dr Charles Clarke "Peter Boardman"Archived 27 May 2013 at the Wayback Machine; Dennis Gray "Peter" Climber and Rambler August 1982, pp46-47; Walt Unsworth "Peter David Boardman (1950–1982) Climber and Rambler August 1982, p22; Martin Wragg "Peter Boardman" High No. 5 October/November 1982, p14-15.