@article{DAN_1981_256_2_a6,
     author = {A. M. Rubinov},
     title = {Dynamical systems and preorders},
     journal = {Doklady Akademii Nauk},
     pages = {287--290},
     year = {1981},
     volume = {256},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1981_256_2_a6/}
}