@article{MABA_1989_3_3-4_a16,
     author = {V. H. Hristov},
     title = {Best {Onesided} {Approximations} and {Mean} {Approximations} by {Interpolation} {Polynomials} of {Periodic} {Functions}},
     journal = {Mathematica balkanica},
     pages = {418},
     publisher = {mathdoc},
     volume = {3},
     number = {3-4},
     year = {1989},
     url = {http://geodesic.mathdoc.fr/item/MABA_1989_3_3-4_a16/}
}