@article{IVM_1969_6_a10,
     author = {A. H. Turetzkii},
     title = {A~class of functions for which a~given summation method yields the best order {approximation.~III}},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {80--87},
     publisher = {mathdoc},
     number = {6},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1969_6_a10/}
}