↑Biggar, John, 2015. The Andes: A Guide for Climbers (4th edition, ISBN978-0-9536087-4-4). Several elevations given by this authority are much lower than those given by other authorities, and the higher elevations are not supported by official Chilean IGM maps.
↑Abraham, Rudolf (2011). Torres del Paine: Trekking in Chile's Premier National Park. Milnthorpe: Cicerone Press. p. 17. ISBN978-1-84965-356-5. Retrieved 4 August 2015.