@article{ARM_2002__38_4_a1,
     author = {Ashraf, Mohammad and Nadeem-ur-Rehman},
     title = {On $(\sigma,\tau)$-derivations in prime rings},
     journal = {Archivum mathematicum},
     pages = {259--264},
     publisher = {mathdoc},
     volume = {38},
     number = {4},
     year = {2002},
     mrnumber = {1942655},
     zbl = {1068.16047},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_2002__38_4_a1/}
}