P. Nason, S. Dawson, and R. K. Ellis, The one particle inclusive differential cross section for heavy quark production in hadronic collisions, Nuclear Physics B, vol.327, issue.1, p.49, 1989.
DOI : 10.1016/0550-3213(89)90286-1

M. Mangano, P. Nason, and G. Ridolfi, Heavy-quark correlations in hadron collisions at next-to-leading order, Nuclear Physics B, vol.373, issue.2, p.295, 1992.
DOI : 10.1016/0550-3213(92)90435-E

U. Collaboration and C. Albajar, Measurement of $$b\bar b$$ correlations at the CERN $$p\bar p$$ collider, Zeitschrift f??r Physik C Particles and Fields, vol.200, issue.1, p.41, 1994.
DOI : 10.1007/BF01641885

F. Cdf-collaboration and . Abe, FERMILAB-PUB-98/392-E, submitted to, Phys. Rev. D

F. Carminati, GEANT Users Guide (unpublished) [13] A. Smith http://www-d0.fnal.gov/results, Phys. Rev. Lett. Phys. Rev. D, vol.1514, issue.50, p.1, 1991.