@article{IM_1966__1_141832,
     author = {D. B. A. EPSTEIN},
     title = {Steenrod {Operations} in {Homological} {Algebra.}},
     journal = {Inventiones mathematicae},
     pages = {152--208},
     publisher = {mathdoc},
     volume = {1},
     year = {1966},
     zbl = {0139.01502},
     url = {http://geodesic.mathdoc.fr/item/IM_1966__1_141832/}
}