Collier references

[DDH17], [DD11], [DD06], [DD03]

[DD11]A. Denner and S. Dittmaier. Scalar one-loop 4-point integrals. Nucl. Phys., B844:199–242, 2011. arXiv:1005.2076, doi:10.1016/j.nuclphysb.2010.11.002.
[DD03]Ansgar Denner and S. Dittmaier. Reduction of one loop tensor five point integrals. Nucl. Phys., B658:175–202, 2003. arXiv:hep-ph/0212259, doi:10.1016/S0550-3213(03)00184-6.
[DD06]Ansgar Denner and S. Dittmaier. Reduction schemes for one-loop tensor integrals. Nucl. Phys., B734:62–115, 2006. arXiv:hep-ph/0509141, doi:10.1016/j.nuclphysb.2005.11.007.
[DDH17]Ansgar Denner, Stefan Dittmaier, and Lars Hofer. Collier: a fortran-based Complex One-Loop LIbrary in Extended Regularizations. Comput. Phys. Commun., 212:220–238, 2017. arXiv:1604.06792, doi:10.1016/j.cpc.2016.10.013.