@article{PM_1997_1997_1_a4,
     author = {Gasull, Armengol and Koolj, Robert E. and Torregrosa, Joan},
     title = {Ciclos l{\'\i}mites en el modelo {Holling-Tanner.}},
     journal = {Publicacions matem\`atiques},
     pages = {149-167},
     publisher = {mathdoc},
     volume = {41},
     number = {1},
     year = {1997},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PM_1997_1997_1_a4/}
}