@article{VSGU_2010_2_a18,
     author = {Yu. P. Phrolov},
     title = {Vectors of evolution},
     journal = {Vestnik Samarskogo universiteta. Estestvennonau\v{c}na\^a seri\^a},
     pages = {216--225},
     year = {2010},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSGU_2010_2_a18/}
}