@article{SJIM_2007_10_3_a5,
     author = {O. I. Il'in},
     title = {On the optimal exploitation of fish populations with an age structure},
     journal = {Sibirskij \v{z}urnal industrialʹnoj matematiki},
     pages = {43--57},
     publisher = {mathdoc},
     volume = {10},
     number = {3},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SJIM_2007_10_3_a5/}
}