@article{VMUMM_1998_2_a4,
     author = {A. B. Shapoval},
     title = {Liouville's theorem for a second-order elliptic equation with degenerate coefficients},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {21--26},
     publisher = {mathdoc},
     number = {2},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1998_2_a4/}
}