@article{DAN_1980_254_1_a1,
     author = {A. A. Bolotov},
     title = {On problems of reducibility and expressibility for homogeneous structures with inputs and outputs},
     journal = {Doklady Akademii Nauk},
     pages = {14--16},
     year = {1980},
     volume = {254},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1980_254_1_a1/}
}