P. Nason, S. Dawson & R. Keith Ellis (1988). "The Total Cross-Section for the Production of Heavy Quarks in Hadronic Collisions". Nuclear Physics. B303 (4): 607–633. Bibcode:1988NuPhB.303..607N. doi:10.1016/0550-3213(88)90422-1.
P. Nason, S. Dawson & R. Keith Ellis (1988). "The Total Cross-Section for the Production of Heavy Quarks in Hadronic Collisions". Nuclear Physics. B303 (4): 607–633. Bibcode:1988NuPhB.303..607N. doi:10.1016/0550-3213(88)90422-1.