It was wikipedia, but I chased the references down to the source material in Science: http://www.sciencemag.org/news/2015/11/just-nudge-could-collapse-west-anta

It was wikipedia, but I chased the references down to the source material in Science: http://www.sciencemag.org/news/2015/11/just-nudge-could-collapse-west-antarctic-ice-sheet-raise-sea-levels-3-meters http://www.sciencemag.org/news/2015/11/just-nudge-could-coll...