1. J. L. Cardt andA. White:Phys. Lett.,47 B, 445 (1973);I. Halliday andC. T. Sachrajda:Phys. Rev. D,8, 3598 (1973);A. A. Migdal,A. M. Polyakov andK. A. Ter-Martirosyan:Phys. Lett.,48 B, 239 (1974);H. D. I. Abarbanel,J. Bartels,J. M. Bronzan andD. Sidhu:Phys. Rev. D,12, 2496 (1975).
2. N. S. Craigie, J. Körner andG. Kramer:Nucl. Phys.,68 B, 509 (1974).
3. N. S. Craigie andG. Kramer:Nucl. Phys.,75 B, 509 (1974).
4. K. Ahmed,N. S. Craigie,J. Körner and G. Kramer:Target asymmetry in inclusive pholoprouction of pions, DESY preprint 75/39 (1975).
5. P. Choudhury,K. J. M. Moriarty,J. H. Tabor andA. Ungkitchanukit :Absorption corrections in the inclusive production of vector mesons in the fragmentation region, Royal Holloway College preprint (May 1976);