%0 Journal Article %A A.O. Belyakov %A V.M. Veliov %T Constant Versus Periodic Fishing: Age Structured Optimal Control Approach %J Mathematical modelling of natural phenomena %D 2014 %P 20-37 %V 9 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.1051/mmnp/20149403/ %R 10.1051/mmnp/20149403 %G en %F MMNP_2014_9_4_a2