@article{MZM_2009_86_6_a15,
     author = {Xianglin Wei and Wenhua Lan and Ren Ding},
     title = {Letter to the {Editor}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {954},
     publisher = {mathdoc},
     volume = {86},
     number = {6},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2009_86_6_a15/}
}