@article{10_4064_sm_25_3_369_371,
     author = {C. Kassimatis},
     title = {On generalized derivatives},
     journal = {Studia Mathematica},
     pages = {369--371},
     publisher = {mathdoc},
     volume = {25},
     number = {3},
     year = {1964},
     doi = {10.4064/sm-25-3-369-371},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-25-3-369-371/}
}