LHCb collaboration, Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., et al. (2020). Test of lepton universality with Λb0→pK-ℓ+ℓ- decays. Journal of high energy physics: JHEP, 2020(5): 40. doi:10.1007/JHEP05(2020)040.