Pei, S.-C.S.-C.PeiLiu, C.-L.C.-L.Liu2019-04-232019-04-232012https://www.scopus.com/inward/record.uri?eid=2-s2.0-84867592448&doi=10.1109%2fICASSP.2012.6288720&partnerID=40&md5=70795a5917d1fcb4f6ee5a05b3637b4ehttps://scholars.lib.ntu.edu.tw/handle/123456789/405776A general form of 2D Fourier transform eigenfunctionsconference paper10.1109/ICASSP.2012.62887202-s2.0-84867592448