@article{VMUMM_2006_2_a6,
     author = {V. F. Nikitin and N. N. Smirnov and V. R. Dushin},
     title = {Unstable displacement of a liquid from a porous medium with variable permeability},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {33--40},
     publisher = {mathdoc},
     number = {2},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2006_2_a6/}
}