Pseudo-scalar Higgs boson production at threshold NLO and NLL QCDTaushif Ahmed, M. C. Kumar, Prakash Mathews, Narayan Rana and V. RavindranEur. Phys. J. C, 76 6 (2016) 355DOI: https://doi.org/10.1140/epjc/s10052-016-4199-1