1 论文题目：free vibration of anistropic composite thin-walled beams of closed cross-section contour

作者及相关信息：Song O，Librescu L.

                                Journal  of Sound and vibration 1993:167(1):129-147

2 标题：dynamic behavior of aircraft wings modeled as doubly-tapered composite thin-walled beams

作者：Na SS，Librescu L.

发表于：Recent adwances in solids an structures, vol.398, New  York: ASME; 1999. p.59-68