@article{IVM_1975_10_a8,
     author = {F. D. Beznosikov},
     title = {Extension of an outer homomorphism of {Boolean} algebras that is $\sigma$-continuous at zero},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {80--81},
     year = {1975},
     number = {10},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1975_10_a8/}
}