@article{MABA_2004_18_3-4_a29,
     author = {Lj. Protic and L. Stefanovska and M. Canak},
     title = {On {Some} {Approximate} {Methods} for {Solving} {Vekua} {Complex} {Differential} {Equation}},
     journal = {Mathematica balkanica},
     pages = {485},
     publisher = {mathdoc},
     volume = {18},
     number = {3-4},
     year = {2004},
     url = {http://geodesic.mathdoc.fr/item/MABA_2004_18_3-4_a29/}
}