@article{DAN_1987_295_2_a6,
     author = {A. V. Mikhailov and A. B. Shabat and R. I. Yamilov},
     title = {On an extension of the module of invertible transformations},
     journal = {Doklady Akademii Nauk},
     pages = {288--291},
     publisher = {mathdoc},
     volume = {295},
     number = {2},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_295_2_a6/}
}