(en) Jon Krakauer, Into Thin Air, Villard, 1997, p. 21 : « More than one critic of the Seven Summits concept has pointed out that a considerably more difficult challenge than ascending the highest peak on each continent would be to climb the second-highest peak on each continent, a couple of which happen to be very demanding climbs »EnglishPatterns - A Personal Account of the Mt. Everest Disaster.
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(en) « Puncak Trikora is the most accessible of the 3 tallest mountains in Papua. » [lire en ligne].
