First observation of the $B^{+}D_{s}^{+}D_{s}^{-}K^{+}$ decay

LHCb Collaboration; Bernet, R; Müller, K; Owen, P; Serra, N; Steinkamp, O; et al (2023). First observation of the $B^{+}D_{s}^{+}D_{s}^{-}K^{+}$ decay. Physical review D, 108:034012.