Derrick, M.M.DerrickMIN-ZU WANG2018-09-102018-09-101995-06http://inspirehep.net/record/396314http://scholars.lib.ntu.edu.tw/handle/123456789/315414Diffractive hard photoproduction at HERA and evidence for the gluon content of the pomeronjournal article10.1016/0370-2693(95)00803-S