@article{VSGU_2011_2_a5,
     author = {V. N. Razzhevaikin and A. T. Yusufov},
     title = {The optimal expluatation of double age biological population},
     journal = {Vestnik Samarskogo universiteta. Estestvennonau\v{c}na\^a seri\^a},
     pages = {57--69},
     publisher = {mathdoc},
     number = {2},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSGU_2011_2_a5/}
}