@article{MABA_2007_21_1-2_a7,
     author = {Chokri Abdelkefi and Bechir Amri and Mohamed Sifi},
     title = {Pseudo-Differential {Operator} {Associated} with the {Bessel} {Operator}},
     journal = {Mathematica balkanica},
     pages = {79},
     publisher = {mathdoc},
     volume = {21},
     number = {1-2},
     year = {2007},
     url = {http://geodesic.mathdoc.fr/item/MABA_2007_21_1-2_a7/}
}