%0 Journal Article %A F. D. Beznosikov %T Extension of an outer homomorphism of Boolean algebras that is $\sigma$-continuous at zero %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1975 %P 80-81 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1975_10_a8/ %G ru %F IVM_1975_10_a8