Constructing local composite operators for glueball states from a confining Gribov propagator M.A.L. Capri, A.J. Gómez, M.S. Guimaraes, V.E.R. Lemes, S.P. Sorella and D.G. Tedesco Eur. Phys. J. C, 71 1 (2011) 1525 Published online: 05 January 2011 DOI: 10.1140/epjc/s10052-010-1525-x