@article{VMUMM_1989_2_a21,
     author = {S. A. Logunov},
     title = {Weak $p$-points can, but need not be $o$-points},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {79--81},
     year = {1989},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1989_2_a21/}
}