@article{10_4064_ap_41_3_283_292,
     author = {Krystyna Sk\'ornik},
     title = {On local derivatives},
     journal = {Annales Polonici Mathematici},
     pages = {283--292},
     year = {1983},
     volume = {41},
     number = {3},
     doi = {10.4064/ap-41-3-283-292},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-41-3-283-292/}
}