@article{MS2_1972__30_166226,
     author = {Erik K. Pedersen and Leif Kristensen},
     title = {The {...-Module} {Structure} for the {Cohomology} of {Two-Stage} {Spaces.}},
     journal = {Mathematica Scandinavica},
     pages = {95--106},
     publisher = {mathdoc},
     volume = {30},
     year = {1972},
     zbl = {0276.55013},
     url = {http://geodesic.mathdoc.fr/item/MS2_1972__30_166226/}
}