@article{DAN_1989_308_2_a3,
     author = {K. V. Shakhbazyan},
     title = {Representation of processes in graphs},
     journal = {Doklady Akademii Nauk},
     pages = {278--280},
     year = {1989},
     volume = {308},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_308_2_a3/}
}