"10.1073/pnas.0811729106" . "Turning back from the brink: Detecting an impending regime shift in time to avert it"^^ . . "106" . "826-831" . "2009"^^ . "10.1073/pnas.0811729106" . . . _:genid1 . _:genid1 . _:genid1 . _:genid1 . _:genid2 . _:genid2 . _:genid2 . _:genid2 . _:genid2 . _:genid3 . _:genid3 . _:genid3 . _:genid3 . _:genid3 . . . . .