@article{MZ_1973__132_171905,
     author = {Donald M. Davis and Victor P. Snaith},
     title = {Massey {Products} and {H} (p, {q)-Systems.}},
     journal = {Mathematische Zeitschrift},
     pages = {1--10},
     publisher = {mathdoc},
     volume = {132},
     year = {1973},
     zbl = {0249.55018},
     url = {http://geodesic.mathdoc.fr/item/MZ_1973__132_171905/}
}