@article{MZ_1974__136_172038,
     author = {Surender K. Gupta},
     title = {A {Note} on {Derivations} of {Commutative} {Rings.}},
     journal = {Mathematische Zeitschrift},
     pages = {245--248},
     year = {1974},
     volume = {136},
     zbl = {0265.13003},
     url = {http://geodesic.mathdoc.fr/item/MZ_1974__136_172038/}
}