@article{10_1017_S0017089500008077,
     author = {Bresar, Matej},
     title = {On the distance of the composition of two derivations to the generalized derivations},
     journal = {Glasgow mathematical journal},
     pages = {89--93},
     year = {1991},
     volume = {33},
     number = {1},
     doi = {10.1017/S0017089500008077},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500008077/}
}