@article{KUKTF_1981_a4,
     author = {A. L. Kuz'mina},
     title = {Construction of a~polynomial for best approximation of a~derivative function in~$L_2[-1,1]$},
     journal = {Konstruktivnaya Teoriya Funktsii i Funktsional'nyi Analiz},
     pages = {38--43},
     publisher = {mathdoc},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUKTF_1981_a4/}
}