@article{TIMM_2005_11_2_a7,
     author = {V. I. Ivanov and D. V. Gorbachev and Yu. D. Rudomazina},
     title = {Some extremal problems for periodic functions with conditions on their values and {Fourier} coefficients},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {92--111},
     publisher = {mathdoc},
     volume = {11},
     number = {2},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2005_11_2_a7/}
}