Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1992_51_6_a20, author = {N. V. Grigorenko}, title = {Letter to editor}, journal = {Matemati\v{c}eskie zametki}, pages = {155}, publisher = {mathdoc}, volume = {51}, number = {6}, year = {1992}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1992_51_6_a20/} }
N. V. Grigorenko. Letter to editor. Matematičeskie zametki, Tome 51 (1992) no. 6. http://geodesic.mathdoc.fr/item/MZM_1992_51_6_a20/