Voir la notice de l'article provenant de la source Math-Net.Ru
@article{AL_1968_7_3_a12, author = {N. S. Romanovskii}, title = {Letter to the editor}, journal = {Algebra i logika}, pages = {123}, publisher = {mathdoc}, volume = {7}, number = {3}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1968_7_3_a12/} }
N. S. Romanovskii. Letter to the editor. Algebra i logika, Tome 7 (1968) no. 3. http://geodesic.mathdoc.fr/item/AL_1968_7_3_a12/