Lu, C.-J.C.-J.LuWang, M.-C.M.-C.WangHuang, S.-H.S.-H.HuangCHUNG-JEN LU2020-01-132020-01-132009https://scholars.lib.ntu.edu.tw/handle/123456789/447068Analytical study of the stability of a two-ball automatic balancerjournal article10.1016/j.ymssp.2008.06.0082-s2.0-58049137089https://www.scopus.com/inward/record.uri?eid=2-s2.0-58049137089&doi=10.1016%2fj.ymssp.2008.06.008&partnerID=40&md5=ef720c91388e048c9debfa0540bb9b98