%0 Journal Article %A Bacon, Philip %T Axioms for Bockstein homomorphisms %J Portugaliae mathematica %D 1979 %P 255-264 %V 38 %N 3-4 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1979__38_3-4_115408/ %G en %F PORMA_1979__38_3-4_115408