Properties of multihadronic events with a final state photon at $$\sqrt s = M_{Z^0 } $$ - Acton, P. D.; Alexander, G.; Allison, J.; Allport, P. P.; Anderson, K. J.; Arcelli, S.; Ashton, P.; Astbury, A.; Axen, D.; Azuelos, G.; Bahan, G. A.; Baines, J. T. M.; et al. (Springer, 1992)
http://dx.doi.org/10.1007/BF01566648
Keywords: U