@article{MZ_1967__98_170756,
     author = {Leonard Gewirtzman},
     title = {Anti-isomorphisms of the {Endomorphism} {Rings} of {Torsion-Free} {Modules.}},
     journal = {Mathematische Zeitschrift},
     pages = {391--400},
     publisher = {mathdoc},
     volume = {98},
     year = {1967},
     zbl = {0152.01703},
     url = {http://geodesic.mathdoc.fr/item/MZ_1967__98_170756/}
}