TY - JOUR AU - Rong Liu AU - Guirong Liu TI - Theory of optimal harvesting for a size structured model of fish JO - Mathematical modelling of natural phenomena PY - 2020 VL - 15 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.1051/mmnp/2019006/ DO - 10.1051/mmnp/2019006 LA - en ID - MMNP_2020_15_a20 ER -