A Direct Theorem for the Best Algebraic Approximation in Lp[-1,1], (01)
Mathematica balkanica, Tome 4 (1990) no. 3-4, p. 381.

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     author = {Gancho T. Tachev},
     title = {A {Direct} {Theorem} for the {Best} {Algebraic} {Approximation} in {Lp[-1,1],} (0<p<1)},
     journal = {Mathematica balkanica},
     pages = {381},
     publisher = {mathdoc},
     volume = {4},
     number = {3-4},
     year = {1990},
     url = {http://geodesic.mathdoc.fr/item/MABA_1990_4_3-4_a15/}
}
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Gancho T. Tachev. A Direct Theorem for the Best Algebraic Approximation in Lp[-1,1], (0