@article{MZ_1967__95_170654,
     author = {Adolf Mader},
     title = {A {Note} on {Direct} and {Semi-direct} {Products} of {Groups.}},
     journal = {Mathematische Zeitschrift},
     pages = {272--275},
     publisher = {mathdoc},
     volume = {95},
     year = {1967},
     zbl = {0145.02403},
     url = {http://geodesic.mathdoc.fr/item/MZ_1967__95_170654/}
}