[en] The studies of hyperon reactions with antiprotons close to threshold offer an excellent opportunity to examine the dynamics of strangeness creation. At the LEAR facility at CERN, the PS185 Collaboration has initiated a set of measurements of the process bar pp → bar ΛΛ between the reaction threshold and excess energies of 170 MeV. Above an antiproton momentum of 1.65 GeV/c the reaction bar pp → bar ΛΣ⁰ + c.c. offers the possibility of studying the isospin structure in strangeness exchange (I = J = 0 for the Λ and I = J = 1 for the Σ⁰). For the charged bar ΣΣ channels (Σ⁺ and Σ^-), no data exist in the accessible range of LEAR, which corresponds to the region close to threshold. A dedicated run of experiment PS185 to measure the reactions bar pp → bar Σ⁺Σ⁺ and bar pp → bar Σ^-Σ^- is in preparation. 19 refs., 5 figs