@article{VSGTU_2011_2_a20,
     author = {A. S. Pivivarova and A. A. Steryakov},
     title = {Johansen--Sornette hierarchical model of financial crashes and its ultrametric generalization},
     journal = {Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences},
     pages = {162--169},
     publisher = {mathdoc},
     number = {2},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSGTU_2011_2_a20/}
}