@article{JSFU_2017_10_2_a8,
     author = {Salah Benyoucef and Ahmed Bendjeddou},
     title = {Kolmogorov system with explicit hyperbolic limit cycle},
     journal = {\v{Z}urnal Sibirskogo federalʹnogo universiteta. Matematika i fizika},
     pages = {216--222},
     publisher = {mathdoc},
     volume = {10},
     number = {2},
     year = {2017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JSFU_2017_10_2_a8/}
}