Search for new phenomena in events containing a same-flavour opposite-sign dilepton pair, jets, and large missing transverse momentum in [Formula: see text] [Formula: see text][Formula: see text] collisions with the ATLAS detector. - Aaboud M; Aad G; Abbott B; Abdallah J; Abdinov O; Abeloos B; AbouZeid OS; Abraham NL; Abramowicz H; Abreu H; Abreu R; Abulaiti Y; et al. (The European physical journal. C, Particles and fields, 2017)