30论坛币求英文文献三篇

（1）
作者：H.L.WETTERGREN.
标题：Dynamic instability of composite rotor[C].
来源：IFToMM Fourth International Conference on Rotor Dynamics(Chicago ILLinois 7-9, September),1994,287-292.
（2）
作者：J W LIM and M S DARLOW .
标题：Optimal sizing of composite power transmission shafting[J].
来源：Journal of American Helicopter Society,1986,  31:75-83.
相关链接：http://ahsjournal.org/resource/1/jhesak/v31/i1/p75_s1?isAuthorized=no
（3）题目A Practical Upper Bound for Departure from Normality
作者Lee, S. L
来源SIAM Journal on Martix Analysis and Applications, v 16, n 2, p 462, 1995

A Practical Upper Bound for Departure from Normality