Search for the lepton flavour violating decay B+ -> K+mu(-)tau(+) using Bs20 decays - Aaij, R; Beteta, CA; Adeva, B; Adinolfi, M; Aidala, CA; Ajaltouni, Z; Akar, S; Albicocco, P; Albrecht, J; Alessio, F; Alexander, M; Albero, AA; et al. (The Journal of High Energy Physics, 2020)