"To the bottom of the sea" Archived 2008-12-03 at the Wayback Machine, T. A. Heppenheimer, AmericanHeritage.com "Robot Sub Reaches the World's Deepest Abyss".
Nuoroda tikrinta 2008-09-25.  „To the bottom of the sea“, T. A. Heppenheimer, AmericanHeritage.com „Robot Sub Reaches the World's Deepest Abyss“.