@article{LKN_2009_13_13_a0,
     author = {M. E. Changa},
     title = {The method of trigonometric sums},
     journal = {Lekcionnye kursy NOC},
     pages = {3--46},
     year = {2009},
     volume = {13},
     number = {13},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/LKN_2009_13_13_a0/}
}