@article{DAN_1982_262_6_a10,
     author = {A. A. Tverskoi},
     title = {A study of the recursiveness and authenticity of signature functions in non standard},
     journal = {Doklady Akademii Nauk},
     pages = {1325--1328},
     year = {1982},
     volume = {262},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1982_262_6_a10/}
}