@article{MABA_1996_10_1_a7,
     author = {B. Bojanov},
     title = {A {Jackson} {Type} {Theorem} for {Tchebycheff} {Systems}},
     journal = {Mathematica balkanica},
     pages = {73},
     publisher = {mathdoc},
     volume = {10},
     number = {1},
     year = {1996},
     url = {http://geodesic.mathdoc.fr/item/MABA_1996_10_1_a7/}
}