%0 Journal Article %A Rong Liu %A Guirong Liu %T Theory of optimal harvesting for a size structured model of fish %J Mathematical modelling of natural phenomena %D 2020 %V 15 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.1051/mmnp/2019006/ %R 10.1051/mmnp/2019006 %G en %F MMNP_2020_15_a20