求英文文献两篇

1. 标题：Joining of AZ31 magnesium alloy strips by laser assisted self-pierce riveting (2009)
作者：Durandet, Y., Deam, R., Beer, A., Song, W., Clegg, R., Blacket, S.
相关链接：http://en.scientificcommons.org/58999067  
2.
标题：Shaft Whirl Induced by Rotor Internal Damping来源：J. Appl. Mech.  -- June 1964 --  Volume 31,  Issue 2, 279 (4 pages) 作者：Ehrich, F. F.
相关链接：http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JAMCAV000031000002000279000001&idtype=cvips&gifs=yes