Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1974_214_1_a8, author = {A. A. Markov}, title = {On the language {\it {{\CYRYA}}}$_0$}, journal = {Doklady Akademii Nauk}, pages = {40--43}, publisher = {mathdoc}, volume = {214}, number = {1}, year = {1974}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1974_214_1_a8/} }
A. A. Markov. On the language {\it Я}$_0$. Doklady Akademii Nauk, Tome 214 (1974) no. 1, pp. 40-43. http://geodesic.mathdoc.fr/item/DAN_1974_214_1_a8/