@article{MABA_1998_12_1-2_a18,
     author = {N. Bozhinov},
     title = {On the {Root} {Function} {Expansion} of a {Nonlocal} {First} {Order} {Integro-Differential} {Operator}},
     journal = {Mathematica balkanica},
     pages = {225},
     publisher = {mathdoc},
     volume = {12},
     number = {1-2},
     year = {1998},
     url = {http://geodesic.mathdoc.fr/item/MABA_1998_12_1-2_a18/}
}