Strange and Non-Strange (Anti-)Baryon Production at 200 GeV per Nucleon
  Rapidity distributions of net hyperons ($\Lambda - \overline{\Lambda}$) are compared to distributions of participant protons ($p - \overline{p}$). Strangeness production (mean multiplicities of produced $\Lambda/\Sigma^0$ hyperons and $\langle K + \overline{K} \rangle$) in central nucleus-nucleus collisions is shown for different collision systems at different energies. An enhanced production of $\overline{\Lambda}$ compared to $\overline{p}$ is observed at 200 GeV per nucleon. 
Dieter Roehrich and NA35 Collaboration