@article{SEMR_2007_4_a13,
     author = {A. T. Nurtazin},
     title = {Graphs and models with finite chains},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {238--248},
     year = {2007},
     volume = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2007_4_a13/}
}