@article{VMUMM_1992_3_a4,
     author = {A. N. Kazakov},
     title = {Finitely compact extensions with $G_\sigma$-diagonal},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {19--22},
     publisher = {mathdoc},
     number = {3},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1992_3_a4/}
}