@article{EJDE_2003__2003__a28,
     author = {Ainseba,  Bedr'Eddine and Ani\c{t}a,  Sebastian and Langlais,  Michel},
     title = {Optimal control for a nonlinear age-structured population dynamics model},
     journal = {Electronic journal of differential equations},
     year = {2003},
     volume = {2003},
     zbl = {1016.92026},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2003__2003__a28/}
}