\Bibitem{KuzMat79} \by V.~E.~Kuzmina, S.~K.~Matveev \paper Numerical study of the unstable interaction of a supersonic stream with a flat barrier \jour Prikl. Mekh. Tekh. Fiz. \yr 1979 \vol 20 \issue 6 \pages 93--99 \mathnet{http://mi.mathnet.ru/pmtf6408} \transl \jour J. Appl. Mech. Tech. Phys. \yr 1979 \vol 20 \issue 6 \pages 732--737 \crossref{https://doi.org/10.1007/BF00908666}