标题：[求助]英文文献三篇

第一篇

题名：A Maximum Likelihood Method for Detecting Directional Evolution in Protein Sequences and Its Application to Influenza A Virus

作者：Sergei L. Kosakovsky Pond

期刊全称及年份，卷（期），起止页码：Molecular Biology and Evolution 2008 25(9):1809-1824

电子链接：http://mbe.oxfordjournals.org/cgi/content/abstract/25/9/1809

第二篇

题名：Mapmaker for the World of Influenza

作者：Martin Enserink

期刊全称及年份，卷（期），起止页码：Science 18 April 2008:Vol. 320. no. 5874, pp. 310 - 311

电子链接：http://www.sciencemag.org/cgi/content/summary/sci;320/5874/310

第三篇

题名：Studies Reveal How Influenza Virus Antigenic Variation Develops and Spreads

作者：Anthony L. Komaroff

期刊全称及年份，卷（期），起止页码：Published in Journal Watch (General) May 8, 2008

电子链接：http://general-medicine.jwatch.org/cgi/content/citation/2008/508/6#

谢谢！

[此贴子已经被作者于2008-9-27 23:47:19编辑过]