Moll, Don, Lauren E. Brown, and Alan Resetar. 2020. “Origins of the Extinct, Subfossil Galápagos Giant Tortoises (Chelonoidis Niger) of the Post Office Lava Tube (Inferior) of Floreana Island: Voluntary or Accidental Occupancy?”. Tropical Natural History 20 (2):134-43. https://li01.tci-thaijo.org/index.php/tnh/article/view/235520.