@article{MABA_2004_18_3-4_a13,
     author = {S. Kempfle and I. Schaefer},
     title = {Physical {Consistency} of {Fractional}},
     journal = {Mathematica balkanica},
     pages = {345},
     publisher = {mathdoc},
     volume = {18},
     number = {3-4},
     year = {2004},
     url = {http://geodesic.mathdoc.fr/item/MABA_2004_18_3-4_a13/}
}