@article{IM_1974__26_142298,
     author = {Carl P. Simon},
     title = {A {Bound} for the {Fixed-Point} {Index} of an {Area-Preserving} {Map} with {Applications} to {Mechanics.}},
     journal = {Inventiones mathematicae},
     pages = {187--200},
     publisher = {mathdoc},
     volume = {26},
     year = {1974},
     zbl = {0331.55006},
     url = {http://geodesic.mathdoc.fr/item/IM_1974__26_142298/}
}