Hsueh, W.-J.W.-J.HsuehWEN-JENG HSUEH2020-01-172020-01-171999https://scholars.lib.ntu.edu.tw/handle/123456789/451938Free and forced vibrations of stepped rods and coupled systemsjournal article10.1006/jsvi.1999.22492-s2.0-0007554546https://www.scopus.com/inward/record.uri?eid=2-s2.0-0007554546&doi=10.1006%2fjsvi.1999.2249&partnerID=40&md5=265e1dad0a8f00d747baa9a89f5637a3