@article{MABA_1987_1_1_a11,
     author = {A. L. Dontchev},
     title = {Duality {Methods} for {Constrained} {Best} {Interpolation}},
     journal = {Mathematica balkanica},
     pages = {96},
     publisher = {mathdoc},
     volume = {1},
     number = {1},
     year = {1987},
     url = {http://geodesic.mathdoc.fr/item/MABA_1987_1_1_a11/}
}