@article{IM_1978__48_142591,
     author = {John Franks and Carolyn Narasimhan},
     title = {The {Periodic} {Behavior} of {Morse-Smale} {Diffeomorphisms.}},
     journal = {Inventiones mathematicae},
     pages = {279--292},
     publisher = {mathdoc},
     volume = {48},
     year = {1978},
     zbl = {0388.58013},
     url = {http://geodesic.mathdoc.fr/item/IM_1978__48_142591/}
}