@article{DA_2013_20_6_a6,
     author = {D. I. Kovalevskaya and F. I. Solov'eva},
     title = {Letter to the {Editor}},
     journal = {Diskretnyj analiz i issledovanie operacij},
     pages = {95--96},
     publisher = {mathdoc},
     volume = {20},
     number = {6},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DA_2013_20_6_a6/}
}