Fedorchenko, A.I.A.I.FedorchenkoStachiv, I.I.StachivWang, A.-B.A.-B.WangWang, W.-C.W.-C.Wang2009-01-212018-06-292009-01-212018-06-292008http://ntur.lib.ntu.edu.tw//handle/246246/107065application/pdf215538 bytesapplication/pdfen-USFundamental frequencies of mechanical systems with N-piecewise constant propertieshttp://ntur.lib.ntu.edu.tw/bitstream/246246/107065/1/20.pdf