@article{PORMA_1954__13_4_114740,
     author = {Herstein, I.N.},
     title = {Generalized commutators in rings},
     journal = {Portugaliae mathematica},
     pages = {137--139},
     publisher = {mathdoc},
     volume = {13},
     number = {4},
     year = {1954},
     mrnumber = {0068524},
     zbl = {0057.27101},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1954__13_4_114740/}
}