  The interactions of $\bar p$ with D(2), Li(7), C(12), S(32), Cu(64) and
Pb(207) nuclei at $40 GeV/c$ were studied by RISC-streamer chamber
spectrometer. The yields of $K^0$ mesons and $\Lambda$ and $\bar\Lambda$
hyperons as functions of the target nucleus mass numbers are investigated. The
experimental results are compared with model predictions using $FRITIOF-7.02$
program package.
