A.  Blach-Overgaard, Svenning, J. - C., and Balslev, H., ?Climate change sensitivity of the African ivory nut palm, Hyphaene petersiana Klotzsch ex Mart. (Arecaceae) a keystone species in SE Africa?, IOP Conference Series: Earth and Environmental ScienceIOP Conference Series: Earth and Environmental Science, p. 012014, 2009.