@article{JSFU_2020_13_4_a0,
     author = {Ahlam Belfar and Rebiha Benterki},
     title = {Centers and limit cycles of generalized {Kukles} polynomial differential systems: phase portraits and limit cycles},
     journal = {\v{Z}urnal Sibirskogo federalʹnogo universiteta. Matematika i fizika},
     pages = {387--397},
     publisher = {mathdoc},
     volume = {13},
     number = {4},
     year = {2020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JSFU_2020_13_4_a0/}
}