@article{10_4064_cm_27_1_133_139,
     author = {Helena Musielak},
     title = {On fractional derivatives},
     journal = {Colloquium Mathematicum},
     pages = {133--139},
     publisher = {mathdoc},
     volume = {27},
     number = {1},
     year = {1973},
     doi = {10.4064/cm-27-1-133-139},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-27-1-133-139/}
}