@article{INTA_1987_25_a1,
     author = {A. V. Mikhalev and E. V. Pankratiev},
     title = {Differential and difference algebra},
     journal = {Itogi Nauki i Tekhniki. Seriya Algebra. Geometriya. Topologiya},
     pages = {67--139},
     year = {1987},
     volume = {25},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTA_1987_25_a1/}
}