@article{ZNSL_2011_389_a15,
     author = {V. A. Kostin and M. N. Nebolsina},
     title = {Letter to the {Editor}},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {283},
     publisher = {mathdoc},
     volume = {389},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2011_389_a15/}
}