Techniques for the treatment of IR divergences in decay processes at NLO and application to the top-quark decayLorenzo Basso, Stefan Dittmaier, Alexander Huss and Luisa OggeroEur. Phys. J. C, 76 2 (2016) 56DOI: https://doi.org/10.1140/epjc/s10052-016-3878-2