TY - JOUR AU - A.O. Belyakov AU - V.M. Veliov TI - Constant Versus Periodic Fishing: Age Structured Optimal Control Approach JO - Mathematical modelling of natural phenomena PY - 2014 SP - 20 EP - 37 VL - 9 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.1051/mmnp/20149403/ DO - 10.1051/mmnp/20149403 LA - en ID - MMNP_2014_9_4_a2 ER -