@article{MABA_1997_11_1-2_a17,
     author = {Bl. Sendov and P. Marinov},
     title = {Orthonormal {Systems} of {Fractal} {Functions}},
     journal = {Mathematica balkanica},
     pages = {169},
     publisher = {mathdoc},
     volume = {11},
     number = {1-2},
     year = {1997},
     url = {http://geodesic.mathdoc.fr/item/MABA_1997_11_1-2_a17/}
}