@article{MM_1998_10_7_a3,
     author = {N. M. Astafieva and E. A. Sharkov},
     title = {Hierarchical structure of railway traffic popular service},
     journal = {Matemati\v{c}eskoe modelirovanie},
     pages = {37--47},
     year = {1998},
     volume = {10},
     number = {7},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MM_1998_10_7_a3/}
}