@article {10.3844/ajassp.2016.1326.1329, article_type = {journal}, title = {A Generalization of the Modified Liouville Equation}, author = {Rovira-Florián, José-Luis and Marin-Ramirez, Ana-Magnolia and Ortiz-Ortiz, Ruben-Dario}, volume = {13}, year = {2016}, month = {Nov}, pages = {1326-1329}, doi = {10.3844/ajassp.2016.1326.1329}, url = {https://thescipub.com/abstract/ajassp.2016.1326.1329}, abstract = {We study the modified Liouville equation using various transformations to build dynamical systems and we use Dulac's criterion for give sufficient conditions of the non-existence of periodic orbits in the dynamical systems generated of the modified Liouville equation.}, journal = {American Journal of Applied Sciences}, publisher = {Science Publications} }