ENA, after Thornton, Need and Crews, <a
href="http://dx.doi.org/10.1126/science.1086185">Science 19
September 2003: 301 (5640), 1714-1717</a>
ENA, after Thornton, Need and Crews, <a
href="http://dx.doi.org/10.1126/science.1086185">Science 19
September 2003: 301 (5640), 1714-1717</a>