@article{MZM_1996_59_3_a22,
     author = {R. I. Grigorchuk},
     title = {Letter to the editor},
     journal = {Matemati\v{c}eskie zametki},
     pages = {477},
     publisher = {mathdoc},
     volume = {59},
     number = {3},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1996_59_3_a22/}
}