1. M. Krawczyk, Talk at Photon 2000, Ambleside, England, 26–31 August 2000, hep-ph/0012179, to be published in the AIP Conf. Series CP571 (2001), A.J. Finch (Ed.), and references therein
2. D. Barber, in: J. Blümlein, W.D. Nowak (Eds.) Proc. of the “Zeuthen Workshop on the Prospects of Spin Physics at HERA”, DESY 95-200, p. 76
3. Photoproduction of jets and heavy flavors at future polarized ep -colliders
4. POLARIZED DEEP INELASTIC SCATTERING FROM PHOTON TARGETS AND AXIAL ANOMALIES
5. Axial anomaly and sum rule for the photon spin structure function