@article{IM2_2012_76_3_a7,
     author = {A. A. Ryabchenko and E. A. Samosvat},
     title = {On the number of subgraphs of the {Barab\'asi{\textendash}Albert} random graph},
     journal = {Izvestiya. Mathematics},
     pages = {607--625},
     year = {2012},
     volume = {76},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2012_76_3_a7/}
}