@article{05564153,
title = {Solving ratio-dependent predator-prey system with constant effort harvesting using homotopy perturbation method.},
journal = {Mathematical Problems in Engineering},
volume = {2008},
year = {2008},
doi = {10.1155/2008/945420},
zbl = {1175.34012},
language = {en},
url = {http://dml.mathdoc.fr/item/05564153}
}
Ghotbi, Abdoul R.; Barari, A.; Ganji, D.D. Solving ratio-dependent predator-prey system with constant effort harvesting using homotopy perturbation method.. Mathematical Problems in Engineering, Tome 2008 (2008) . doi : 10.1155/2008/945420. http://gdmltest.u-ga.fr/item/05564153/