In the last year four new parametrizations of the Hadronic Photon Structure Function at Next to Leading Order have appeared. In this talk, I briefly review the main features of the three of them: the FFNSCJK, CJK and AFG.
PACS numbers: 13.60.Hb, 14.70.Bh, 14.65.Dw, 14.65.Fy
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