@article{FPM_2013_18_5_a8,
     author = {G. G. Magaril-Il'yaev and K. Yu. Osipenko},
     title = {On best harmonic synthesis of periodic functions},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {155--174},
     publisher = {mathdoc},
     volume = {18},
     number = {5},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2013_18_5_a8/}
}