@article{MMNP_2020_15_a20,
     author = {Rong Liu and Guirong Liu},
     title = {Theory of optimal harvesting for a size structured model of fish},
     journal = {Mathematical modelling of natural phenomena},
     eid = {1},
     publisher = {mathdoc},
     volume = {15},
     year = {2020},
     doi = {10.1051/mmnp/2019006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1051/mmnp/2019006/}
}