@article{MABA_1999_13_3-4_a11,
     author = {P. E. Parvanov},
     title = {An {Estimation} of the {Best} {Monotone} {Spline} {Approximation} with the {Averaged} {Moduli} of {Smoothness}},
     journal = {Mathematica balkanica},
     pages = {419},
     publisher = {mathdoc},
     volume = {13},
     number = {3-4},
     year = {1999},
     url = {http://geodesic.mathdoc.fr/item/MABA_1999_13_3-4_a11/}
}