Jiaqiang Li Ronghong Jin JunPing Geng Estimation for Instantaneous Frequency Using a Combined Fractional Time-Frequency Representation. 189-191 2007 90-B IEICE Transactions 1 http://dx.doi.org/10.1093/ietcom/e90-b.1.189 db/journals/ieicet/ieicet90b.html#LiJG07