Wang, K.K.WangXian, Y.Y.XianCHIA-YEN LEEWei, Y.-M.Y.-M.WeiHuang, Z.Z.Huang2020-12-162020-12-162019https://www.scopus.com/inward/record.uri?eid=2-s2.0-85012235852&doi=10.1007%2fs10479-017-2423-5&partnerID=40&md5=007e45fbbe8d2103aff47bf1a27dc840https://scholars.lib.ntu.edu.tw/handle/123456789/526181On selecting directions for directional distance functions in a non-parametric framework: a reviewreview10.1007/s10479-017-2423-52-s2.0-85012235852