@article{ZNSL_2006_337_a8,
     author = {A. S. Zhuk and V. V. Zhuk},
     title = {On approximating periodic functions using linear approximation methods},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {134--164},
     publisher = {mathdoc},
     volume = {337},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2006_337_a8/}
}